[clamav-users] Fwd: Unable to detect pdf virus (Not working in sharepoint)

Steven Morgan smorgan at sourcefire.com
Fri Aug 21 14:43:39 EDT 2015


I've opened https://bugzilla.clamav.net/show_bug.cgi?id=11380. Please
attach to this bugzilla ticket the original pdf file and the original
multipart document.

Thanks.

On Tue, Aug 18, 2015 at 10:48 AM, P K <pkopensrc at gmail.com> wrote:

> Hi Guys,
>
> Again troubling you. Can you please let me know why its not working for
> windows server. Do i need to enable any setting in ClamAv configuration?
>
> I was trying same exploit.pdf virus file to upload in Windows server and
> its not detected by ClamAv Antivirus.
>
> *I tried with detect-pua also and it didn't worked for me*.
>
> It works fine with curl and other software. *Maybe we have to handle
> separately for windows server*.
>
> Looks like its due to way windows servers work to upload file using
> Boundary mechanism.
>
> Below is output of virus file to clamav:
>
> Content-Disposition: form-data; name="__EVENTVALIDATION"
>
> /wEWBAK5276uAwLv4ZO6DgLmgPS1DQL374fcBaj9ZhJYdIZVwZS464ZHv7T3ou6w
> -----------------------------21154944191352840482619583850
> Content-Disposition: form-data; name="destination"
>
>
>
>
>
>
> */AnalyticsReports-----------------------------21154944191352840482619583850Content-Disposition:
> form-data; name="ctl00$PlaceHolderMain$ctl01$ctl05$InputFile";
> filename="exploit.pdf"Content-Type: application/force-download*
> %PDF-1.1
> 1 0 obj
> << /Type /Catalog /Outlines 2 0 R /Pages 3 0 R /OpenAction 5 0 R >>
> endobj
> 2 0 obj
> << /Type /Outlines /Count 0 >>
> endobj
> 3 0 obj
> << /Type /Pages /Kids [4 0 R] /Count 1 >>
> endobj
> 4 0 obj
> << /Type /Page /Parent 3 0 R /MediaBox [0 0 612 792] >>
> endobj
> 5 0 obj
> << /Type /Action /S /JavaScript /JS (
>   VIRUS DATA .....................
> ...........................................
>
>         spray_heap();
>         trigger_bug();
>
>         ) >>
> endobj
> xref
> 0 6
> 0000000000 65535 f
> 0000000010 00000 n
> 0000000096 00000 n
> 0000000145 00000 n
> 0000000205 00000 n
> 0000000279 00000 n
> trailer
> << /Size 6 /Root 1 0 R >>
> startxref
> 1787
> %%EOF
> -----------------------------21154944191352840482619583850
> Content-Disposition: form-data;
> name="ctl00$PlaceHolderMain$ctl01$ctl05$OverwriteSingle"
>
> on
> -----------------------------21154944191352840482619583850
> Content-Disposition: form-data; name="__spText1"
>
>
> -----------------------------21154944191352840482619583850
>
>
> On Thu, Jul 30, 2015 at 3:39 PM, P K <pkopensrc at gmail.com> wrote:
>
> > thanks Shaun. I seen its pushed in latest update.
> >
> > Hope to learn more from you guys.
> >
> > On Wed, Jul 29, 2015 at 7:32 PM, Shaun Hurley <shahurle at sourcefire.com>
> > wrote:
> >
> >> PK,
> >>
> >> Thank you for bringing this to our attention.
> >>
> >> I have created another signature that doesn't rely upon PUA being
> enabled.
> >> As soon as the signature is done being tested for false positives we
> will
> >> publish it.
> >>
> >> Thanks again,
> >> Shaun Hurley
> >> ClamAV Malware Team
> >>
> >> On Tue, Jul 28, 2015 at 10:54 AM, P K <pkopensrc at gmail.com> wrote:
> >>
> >> > worked properly after enabling PUA.
> >> >
> >> > Cheers,
> >> > --PK
> >> >
> >> > On Tue, Jul 28, 2015 at 8:14 PM, Steve Basford <
> >> > steveb_clamav at sanesecurity.com> wrote:
> >> >
> >> > >
> >> > > On Tue, July 28, 2015 3:41 pm, P K wrote:
> >> > > > So how to detect same in my clamAv?
> >> > > >
> >> > >
> >> > > Until a proper sig is added, you could try
> >> > >
> >> > > clamscan  --detect-pua=yes
> >> > >
> >> > > Cheers,
> >> > >
> >> > > Steve
> >> > > Web : sanesecurity.com
> >> > > Blog: sanesecurity.blogspot.com
> >> > >
> >> > > _______________________________________________
> >> > > Help us build a comprehensive ClamAV guide:
> >> > > https://github.com/vrtadmin/clamav-faq
> >> > >
> >> > > http://www.clamav.net/contact.html#ml
> >> > >
> >> > _______________________________________________
> >> > Help us build a comprehensive ClamAV guide:
> >> > https://github.com/vrtadmin/clamav-faq
> >> >
> >> > http://www.clamav.net/contact.html#ml
> >> >
> >> _______________________________________________
> >> Help us build a comprehensive ClamAV guide:
> >> https://github.com/vrtadmin/clamav-faq
> >>
> >> http://www.clamav.net/contact.html#ml
> >>
> >
> >
> _______________________________________________
> Help us build a comprehensive ClamAV guide:
> https://github.com/vrtadmin/clamav-faq
>
> http://www.clamav.net/contact.html#ml
>



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