When I test with the eicar_com.zip or eicarcom2.zip files, I get this
entry in the mail log:

amavis[855]: (00855-01) (!)do_unzip: not a zip: AZ_FORMAT_ERROR (3)

The non-zipped test files are recognized fine and handled properly.

How can I fix this error?

- FreeBSD 6.2-STABLE
- amavisd-new-2.5.0,1
- postfix-2.4.1,1

Log file snippet:

May 23 15:40:01 iguana amavis[743]: starting.  /usr/local/sbin/amavisd at
iguana.floco.com amavisd-new-2.5.0 (20070423), Unicode aware
May 23 15:40:01 iguana amavis[743]: Perl version               5.008008
May 23 15:40:02 iguana amavis[746]: Module Amavis::Conf        2.086
May 23 15:40:02 iguana amavis[746]: Module Archive::Zip        1.18
May 23 15:40:02 iguana amavis[746]: Module BerkeleyDB          0.31
May 23 15:40:02 iguana amavis[746]: Module Compress::Zlib      2.004
May 23 15:40:02 iguana amavis[746]: Module Convert::TNEF       0.17
May 23 15:40:02 iguana amavis[746]: Module Convert::UUlib      1.08
May 23 15:40:02 iguana amavis[746]: Module DB_File             1.814
May 23 15:40:02 iguana amavis[746]: Module Digest::MD5         2.36
May 23 15:40:02 iguana amavis[746]: Module IO::Socket::INET6   2.51
May 23 15:40:02 iguana amavis[746]: Module MIME::Entity        5.420
May 23 15:40:02 iguana amavis[746]: Module MIME::Parser        5.420
May 23 15:40:02 iguana amavis[746]: Module MIME::Tools         5.420
May 23 15:40:02 iguana amavis[746]: Module Mail::Header        1.74
May 23 15:40:02 iguana amavis[746]: Module Mail::Internet      1.74
May 23 15:40:02 iguana amavis[746]: Module Mail::SpamAssassin  3.001008
May 23 15:40:02 iguana amavis[746]: Module Net::DNS            0.59
May 23 15:40:02 iguana amavis[746]: Module Net::Server         0.96
May 23 15:40:02 iguana amavis[746]: Module Net::Server::PreFork 0.96
May 23 15:40:02 iguana amavis[746]: Module Net::Server::PreForkSimple 0.96
May 23 15:40:02 iguana amavis[746]: Module Razor2::Client::Version 2.82
May 23 15:40:02 iguana amavis[746]: Module Time::HiRes         1.9707
May 23 15:40:02 iguana amavis[746]: Module URI                 1.35
May 23 15:40:02 iguana amavis[746]: Module Unix::Syslog        0.100
May 23 15:40:02 iguana amavis[746]: Amavis::DB code      loaded
May 23 15:40:02 iguana amavis[746]: Amavis::Cache code   loaded
May 23 15:40:02 iguana amavis[746]: SQL base code        NOT loaded
May 23 15:40:02 iguana amavis[746]: SQL::Log code        NOT loaded
May 23 15:40:02 iguana amavis[746]: SQL::Quarantine      NOT loaded
May 23 15:40:02 iguana amavis[746]: Lookup::SQL code     NOT loaded
May 23 15:40:02 iguana amavis[746]: Lookup::LDAP code    NOT loaded
May 23 15:40:02 iguana amavis[746]: AM.PDP-in proto code loaded
May 23 15:40:02 iguana amavis[746]: SMTP-in proto code   loaded
May 23 15:40:02 iguana amavis[746]: Courier proto code   NOT loaded
May 23 15:40:02 iguana amavis[746]: SMTP-out proto code  loaded
May 23 15:40:02 iguana amavis[746]: Pipe-out proto code  NOT loaded
May 23 15:40:02 iguana amavis[746]: BSMTP-out proto code NOT loaded
May 23 15:40:02 iguana amavis[746]: Local-out proto code loaded
May 23 15:40:02 iguana amavis[746]: OS_Fingerprint code  NOT loaded
May 23 15:40:02 iguana amavis[746]: ANTI-VIRUS code      loaded
May 23 15:40:02 iguana amavis[746]: ANTI-SPAM code       loaded
May 23 15:40:02 iguana amavis[746]: ANTI-SPAM-SA code    loaded
May 23 15:40:02 iguana amavis[746]: Unpackers code       loaded
May 23 15:40:02 iguana amavis[746]: Found $file            at
/usr/local/bin/file
May 23 15:40:02 iguana amavis[746]: No $dspam,             not using it
May 23 15:40:02 iguana amavis[746]: No $altermime,         not using it
May 23 15:40:02 iguana amavis[746]: Internal decoder for .mail
May 23 15:40:02 iguana amavis[746]: Internal decoder for .asc
May 23 15:40:02 iguana amavis[746]: Internal decoder for .uue
May 23 15:40:02 iguana amavis[746]: Internal decoder for .hqx
May 23 15:40:02 iguana amavis[746]: Internal decoder for .ync
May 23 15:40:02 iguana amavis[746]: Found decoder for    .F    at
/usr/local/bin/unfreeze
May 23 15:40:02 iguana amavis[746]: Found decoder for    .Z    at
/usr/bin/uncompress
May 23 15:40:02 iguana amavis[746]: Found decoder for    .gz   at
/usr/bin/gzip -d
May 23 15:40:02 iguana amavis[746]: Found decoder for    .bz2  at
/usr/bin/bzip2 -d
May 23 15:40:02 iguana amavis[746]: Found decoder for    .lzo  at
/usr/local/bin/lzop -d
May 23 15:40:02 iguana amavis[746]: Found decoder for    .rpm  at
/usr/local/bin/rpm2cpio.pl
May 23 15:40:02 iguana amavis[746]: Found decoder for    .cpio at /bin/pax
May 23 15:40:02 iguana amavis[746]: Found decoder for    .tar  at /bin/pax
May 23 15:40:02 iguana amavis[746]: Found decoder for    .deb  at
/usr/bin/ar
May 23 15:40:02 iguana amavis[746]: Internal decoder for .zip
May 23 15:40:02 iguana amavis[746]: Found decoder for    .7z   at
/usr/local/bin/7zr
May 23 15:40:02 iguana amavis[746]: Found decoder for    .rar  at
/usr/local/bin/unrar
May 23 15:40:02 iguana amavis[746]: Found decoder for    .arj  at
/usr/local/bin/arj
May 23 15:40:02 iguana amavis[746]: Found decoder for    .arc  at
/usr/local/bin/arc
May 23 15:40:02 iguana amavis[746]: Found decoder for    .zoo  at
/usr/local/bin/zoo
May 23 15:40:02 iguana amavis[746]: Found decoder for    .lha  at
/usr/local/bin/lha
May 23 15:40:02 iguana amavis[746]: Found decoder for    .cab  at
/usr/local/bin/cabextract
May 23 15:40:02 iguana amavis[746]: No decoder for       .tnef tried: tnef
May 23 15:40:02 iguana amavis[746]: Internal decoder for .tnef
May 23 15:40:02 iguana amavis[746]: Found decoder for    .exe  at
/usr/local/bin/unrar; /usr/local/bin/lha; /usr/local/bin/arj
May 23 15:40:02 iguana amavis[746]: Using primary internal av scanner
code for ClamAV-clamd
May 23 15:40:02 iguana amavis[746]: Found secondary av scanner
ClamAV-clamscan at /usr/local/bin/clamscan
May 23 15:40:02 iguana amavis[746]: Creating db in /var/amavis/db/;
BerkeleyDB 0.31, libdb 4.1

Testing with eicar_com.zip:

May 23 15:42:45 iguana postfix/pickup[821]: 0AA175CAB: uid=1001
from=<jdohanics>
May 23 15:42:45 iguana postfix/cleanup[2153]: 0AA175CAB:
message-id=<[EMAIL PROTECTED]>
May 23 15:42:45 iguana postfix/qmgr[822]: 0AA175CAB:
from=<[EMAIL PROTECTED]>, size=327, nrcpt=1 (queue active)
May 23 15:42:45 iguana amavis[2057]: (02057-01) (!)do_unzip: not a zip:
AZ_FORMAT_ERROR (3)
May 23 15:42:46 iguana postfix/smtpd[2157]: connect from
localhost[127.0.0.1]
May 23 15:42:46 iguana postfix/smtpd[2157]: EE7935CAD:
client=localhost[127.0.0.1]
May 23 15:42:46 iguana postfix/cleanup[2153]: EE7935CAD:
message-id=<[EMAIL PROTECTED]>
May 23 15:42:46 iguana postfix/smtpd[2157]: disconnect from
localhost[127.0.0.1]
May 23 15:42:46 iguana postfix/qmgr[822]: EE7935CAD:
from=<[EMAIL PROTECTED]>, size=758, nrcpt=1 (queue active)
May 23 15:42:46 iguana amavis[2057]: (02057-01) Passed CLEAN,
<[EMAIL PROTECTED]> -> <[EMAIL PROTECTED]>, Message-ID:
<[EMAIL PROTECTED]>, mail_id: 462Rh88dBfcl,
Hits: 0.102, size: 327, queued_as: EE7935CAD, 1734 ms
May 23 15:42:46 iguana postfix/smtp[2155]: 0AA175CAB:
to=<[EMAIL PROTECTED]>, relay=127.0.0.1[127.0.0.1]:10024, delay=2.1,
delays=0.22/0.16/0.01/1.7, dsn=2.0.0, status=sent (250 2.0.0 Ok: queued
as EE7935CAD)
May 23 15:42:46 iguana postfix/qmgr[822]: 0AA175CAB: removed
May 23 15:42:47 iguana postfix/local[2159]: EE7935CAD:
to=<[EMAIL PROTECTED]>, relay=local, delay=0.17, delays=0/0.1/0/0.07,
dsn=2.0.0, status=sent (delivered to maildir)
May 23 15:42:47 iguana postfix/qmgr[822]: EE7935CAD: removed

Testing with eicar.com:

May 23 16:14:56 iguana postfix/pickup[821]: E07425CAB: uid=1001
from=<jdohanics>
May 23 16:14:56 iguana postfix/cleanup[2387]: E07425CAB:
message-id=<[EMAIL PROTECTED]>
May 23 16:14:56 iguana postfix/qmgr[822]: E07425CAB:
from=<[EMAIL PROTECTED]>, size=383, nrcpt=1 (queue active)
May 23 16:14:57 iguana postfix/smtpd[2391]: connect from
localhost[127.0.0.1]
May 23 16:14:57 iguana postfix/smtpd[2391]: 677BA5CAD:
client=localhost[127.0.0.1]
May 23 16:14:57 iguana postfix/cleanup[2387]: 677BA5CAD:
message-id=<[EMAIL PROTECTED]>
May 23 16:14:57 iguana postfix/smtpd[2391]: disconnect from
localhost[127.0.0.1]
May 23 16:14:57 iguana postfix/qmgr[822]: 677BA5CAD:
from=<[EMAIL PROTECTED]>, size=1929, nrcpt=1 (queue active)
May 23 16:14:57 iguana postfix/smtpd[2391]: connect from
localhost[127.0.0.1]
May 23 16:14:57 iguana postfix/smtpd[2391]: 7CACC5CAF:
client=localhost[127.0.0.1]
May 23 16:14:57 iguana postfix/cleanup[2387]: 7CACC5CAF:
message-id=<[EMAIL PROTECTED]>
May 23 16:14:57 iguana postfix/qmgr[822]: 7CACC5CAF:
from=<[EMAIL PROTECTED]>, size=1051, nrcpt=1 (queue active)
May 23 16:14:57 iguana postfix/smtpd[2391]: disconnect from
localhost[127.0.0.1]
May 23 16:14:57 iguana amavis[2056]: (02056-01) Blocked INFECTED
(Eicar-Test-Signature), <[EMAIL PROTECTED]> ->
<[EMAIL PROTECTED]>, quarantine: virus-9nJ7rIVPQlGn, Message-ID:
<[EMAIL PROTECTED]>, mail_id: 9nJ7rIVPQlGn,
Hits: -, size: 383, 623 ms
May 23 16:14:57 iguana postfix/cleanup[2393]: 813295CB0:
message-id=<[EMAIL PROTECTED]>
May 23 16:14:57 iguana postfix/smtp[2389]: E07425CAB:
to=<[EMAIL PROTECTED]>, relay=127.0.0.1[127.0.0.1]:10024, delay=0.67,
delays=0.02/0.01/0.01/0.63, dsn=2.7.0, status=sent (254 2.7.0 Ok,
discarded, id=02056-01 - VIRUS: Eicar-Test-Signature)
May 23 16:14:57 iguana postfix/qmgr[822]: E07425CAB: removed

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