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Published Jan 20, 2012 | Updated Sep 15, 2017


Severe |Detected with Windows Defender Antivirus

Aliases: JS/Pdfka.EU (Command) Exploit.PDF-JS.DB (BitDefender) Exploit.JS.Pdfka.fla (Kaspersky)


Exploit:Win32/Pdfjsc.YZ is a specially-crafted Portable Document File (PDF), which exploits a vulnerability in Adobe Acrobat and Adobe Reader discussed in the following articles:

When executed in a vulnerable version of Adobe Acrobat or Adobe Reader, it attempts to download a certain file. It has been found included in the Blackhole exploit kit.

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

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:

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