No, these files are not valid swf, as far as I understand. I am currently developing a dynamic analysis defect detection tool, and these files were generated by that tool as input files leading to a crash of application.

However, the crash indicates that there is a bug in the application, and i suppose that the bug should be investigated anyway. Besides, it may possibly occur on valid input files also.
rica...@laptop:~/tmp$ file exploit_*
exploit_180: Macromedia Flash data (compressed), version 0
exploit_20:  Macromedia Flash data, version 0

file command says that this flash files have version 0
Is it a valid swf?

Ricardo



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