Hello,

Since Saturday (2018-07-28) we are seeing many reports from clamscan having
found (possibly) infected files. I suspect these are false positives because checking
the files on virustotal.com returns only clamav reporting them as infected.

The reported files are mostly jar files used by our applications (e.g. httpclient-*.jar,
httpcore-*.jar in different versions). These are the signatures which produce most
of the reports:

Html.Malware.Agent-6625161-0
Html.Malware.Agent-6625163-0
Html.Malware.Agent-6625207-0
Html.Malware.Agent-6625208-0
Html.Malware.Agent-6625209-0
Html.Malware.Agent-6625345-0

Currently, we have whitelisted the above signatures. I suspect that it is an error
in the database because that's the only thing that has changed since Friday. We
are using clamav 0.99.4 and 0.100.0 on Linux with a daily update of the virus
signatures.

I have uploaded the file which generated the most reports yesterday to clamav.net
and requested doublechecking if that would be a false positive.

Does anybody else see such a behaviour? Any ideas of what might be the reason?
Any suggestions what to do? Whitelisting all reported signatures would not be our
preferred solution ...

Thanks a lot,

Peter Albrecht
Senior Linux Administrator 

Wirecard Service Technologies GmbH
Einsteinring 35 | 85609 Aschheim | Germany
Tel: +49 (0) 89 4424-191076
https://www.wirecard.com
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