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Exploit:Win32/Pdfjsc.YP


Exploit:Win32/Pdfjsc.YP is a specially-crafted Portable Document Format (PDF) file that exploits a vulnerability in Adobe Acrobat and Adobe Reader described in the following articles:



What to do now

To detect and remove this threat and other malicious software that may be installed on your computer, run a full-system scan with an appropriate, up-to-date, security solution. The following Microsoft products detect and remove this threat:

For more information on antivirus software, see http://www.microsoft.com/windows/antivirus-partners/.

Update vulnerable PDF applications

This threat exploits known vulnerabilities in Adobe Acrobat and Reader. After removing this threat, make sure that you install the updates available from the vendor. You can read more about these vulnerabilities in PDF documents, as well as where to download the software update from the following links:

Threat behavior

Exploit:Win32/Pdfjsc.YP is a specially-crafted Portable Document Format (PDF) file that exploits a vulnerability in Adobe Acrobat and Adobe Reader described in the following articles:

Exploit:Win32/Pdfjsc.YP is known to be part of the "Blackhole" malware distribution kit.

The PDF file contains malicious JavaScript that checks if it is run on a computer with a vulnerable version of Adobe Acrobat or Adobe Reader. If this is true, Exploit:Win32/Pdfjsc.YP connects to a remote server to download a file, which may be malicious.

Some of the servers it is known to connect to are:

  • stop<removed>eatingmyglasses.com
  • cr<removed>dret.ru

The file is then saved in the computer as "wpbt0.dll".

As of this writing, the files are no longer available.

Analysis by Daniel Chipiristeanu


Symptoms

There are no common symptoms associated with this threat. Alert notifications from installed antivirus software may be the only symptoms.


Prevention


Alert level: Severe
First detected by definition: 1.117.140.0
Latest detected by definition: 1.117.1145.0 and higher
First detected on: Dec 01, 2011
This entry was first published on: Dec 01, 2011
This entry was updated on: Dec 28, 2011

This threat is also detected as:
  • Exploit.JS.Pdfka.fhr (Kaspersky)
  • Exploit.PDF-JS.BN (BitDefender)
  • Exploit.PDF.2645 (Dr.Web)
  • JS/Exploit.Pdfka.PFU trojan (ESET)
  • PDF.Exploit (Ikarus)
  • Exploit.JS.Pdfka.fhr (Kaspersky)
  • Troj/PDFEx-ET (Sophos)