G. Ralph Kuntz created PDFBOX-3645:
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             Summary: Probably not handling header read on bad PDFs
                 Key: PDFBOX-3645
                 URL: https://issues.apache.org/jira/browse/PDFBOX-3645
             Project: PDFBox
          Issue Type: Bug
          Components: Parsing
    Affects Versions: 2.0.4
            Reporter: G. Ralph Kuntz
            Priority: Minor


In COSParser.parseHeader, the code on line 1893 tries to handle PDFs where the 
version number is split on a separate line from the "%PDF-". It assigns the 
newly read line to `header`, detects a line that starts with a digit, then 
breaks.

On line 1902, the code tries again to match the header "%PDF-xxx", but will not 
succeed in the case where the version was on a separate line, because `header` 
will contain only the version number and not the leading `%PDF-`.



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