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Overview

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Exploit-PDF.b.gen is a generic detection for a specially crafted PDF file that exploits a PDF vulnerability.

Aliases

• Exploit.Win32.Pidief.auz (Kaspersky)

• Exploit:Win32/Pdfjsc.AM (Microsoft)

Characteristics

Exploit-PDF.b.gen is a generic detection for a specially crafted PDF file that exploits a PDF vulnerability.

One variant contains obfuscated Javascript intended to exploit the util.printf() buffer overflow vulnerability.

It is downloaded from the following domain(s):

• mart[blocked].cn

The downloaded file can have the following filename(s):

• ts0w[1].pdf

Symptoms

The presence of a suspicious PDF file downloaded without the user's permission.

Method of Infection

One variant is downloaded by Obfuscated Script.f!58 upon visiting a hijacked Web page.

Removal

All Users:
Use current engine and DAT files for detection and removal.

Modifications made to the system Registry and/or INI files for the purposes of hooking system startup, will be successfully removed if cleaning with the recommended engine and DAT combination (or higher).

But in some particular cases, the following steps need to be taken.

Please go to the Microsoft Recovery Console and restore a clean MBR.

On Windows XP:

• Insert the Windows XP CD into the CD-ROM drive and restart the computer.
• When the "Welcome to Setup" screen appears, press R to start the Recovery Console.
• Select the Windows installation that is compromised and provide the administrator password.
• Issue 'fixmbr' command to restore the Master Boot Record
• Follow onscreen instructions.
• Reset and remove the CD from CD-ROM drive.

On Windows Vista and 7:

• Insert the Windows CD into the CD-ROM drive and restart the computer.
• Click on "Repair Your Computer".
• When the System Recovery Options dialog comes up, choose the Command Prompt.
• Issue 'bootrec /fixmbr' command to restore the Master Boot Record.
• Follow onscreen instructions.
• Reset and remove the CD from CD-ROM drive.

Variants

Variants

N/A

All Information

Overview -

-- Update May 21, 2009 --
The risk assessment of this threat has been updated to Low-Profiled due to media attention at:
http://www.theregister.co.uk/2009/05/19/gumblar_google_poisoning_update/

--

Exploit-PDF.b.gen is a generic detection for a specially crafted PDF file that exploits a PDF vulnerability.

Aliases

• Exploit.Win32.Pidief.auz (Kaspersky)

• Exploit:Win32/Pdfjsc.AM (Microsoft)

Characteristics

Characteristics -

Exploit-PDF.b.gen is a generic detection for a specially crafted PDF file that exploits a PDF vulnerability.

One variant contains obfuscated Javascript intended to exploit the util.printf() buffer overflow vulnerability.

It is downloaded from the following domain(s):

• mart[blocked].cn

The downloaded file can have the following filename(s):

• ts0w[1].pdf

Symptoms

Symptoms -

The presence of a suspicious PDF file downloaded without the user's permission.

Method of Infection

Method of Infection -

One variant is downloaded by Obfuscated Script.f!58 upon visiting a hijacked Web page.

Removal -

Removal -

All Users:
Use current engine and DAT files for detection and removal.

Modifications made to the system Registry and/or INI files for the purposes of hooking system startup, will be successfully removed if cleaning with the recommended engine and DAT combination (or higher).

But in some particular cases, the following steps need to be taken.

Please go to the Microsoft Recovery Console and restore a clean MBR.

On Windows XP:

• Insert the Windows XP CD into the CD-ROM drive and restart the computer.
• When the "Welcome to Setup" screen appears, press R to start the Recovery Console.
• Select the Windows installation that is compromised and provide the administrator password.
• Issue 'fixmbr' command to restore the Master Boot Record
• Follow onscreen instructions.
• Reset and remove the CD from CD-ROM drive.

On Windows Vista and 7:

• Insert the Windows CD into the CD-ROM drive and restart the computer.
• Click on "Repair Your Computer".
• When the System Recovery Options dialog comes up, choose the Command Prompt.
• Issue 'bootrec /fixmbr' command to restore the Master Boot Record.
• Follow onscreen instructions.
• Reset and remove the CD from CD-ROM drive.

Variants

Variants -

N/A