C6 Messenger Downloader — PDF malware analysis

Static analysis result for SHA-256 176ea054ebee4485…

MALICIOUS

PDF

57.4 KB Created: 2011-04-27 03:06:51 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: 21e3091b40a4ff744fee81f9927c1177 SHA-1: 2d259c4b3574ba0ba237ad5e5971f7cc4df9925a SHA-256: 176ea054ebee4485e7dc880ee200c9458afa7eac208a3b969cce0446f21a767d
64 Risk Score

Malware Insights

C6 Messenger Downloader · confidence 90%

MITRE ATT&CK
T1203 Exploitation for Client Execution

The PDF file contains a known exploit for CVE-2008-2551, identified as the C6 Messenger Downloader. This exploit is designed to download and execute a secondary payload from a remote location. The embedded URL points to a news article, but the exploit itself is the primary indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2553

Heuristics 3

  • C6 Messenger DownloaderActiveX exploit critical CVE exact CVE_2008_2551
    PDF stream bytes contain HTML/ActiveX content configuring the vulnerable C6 Messenger DownloaderActiveX control with propDownloadUrl and propPostDownloadAction=run. This is the published exploit shape for CVE-2008-2551.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://artisanballoonz.com/system/system.exe
    • http://www.farsnews.com/newstext.php?nn=8903231748
    • http://www.presstv.ir/detail.fa.aspx?id=130281&sectionid=351021501
    • http://www.presstv.ir/detail.fa.aspx?id=130195&sectionid=351021504
    • http://www.presstv.ir/detail.fa.aspx?id=130218&sectionid=351021504
    • http://www.presstv.ir/detail.fa.aspx?id=130215&sectionid=351021504
    • http://www.irna.ir/View/FullStory/?NewsId=1175587
    • http://www.farsnews.com/newstext.php?nn=8903240058
    • http://www.farsnews.com/newstext.php?nn=8903231714
    • http://www.irna.ir/View/FullStory/?NewsId=1175455
    • http://www.farsnews.com/newstext.php?nn=8903221309
    • http://www.irna.ir/View/FullStory/?NewsId=1175575
    • http://www.presstv.ir/detail.fa.aspx?id=130304&sectionid=351021507
    • http://www.presstv.ir/detail.fa.aspx?id=130255&sectionid=351021507
    • http://www.presstv.ir/detail.fa.aspx?id=130281&sectionid=351021501������
    • http://www.presstv.ir/detail.fa.aspx?id=130195&sectionid=351021504������
    • http://www.presstv.ir/detail.fa.aspx?id=130218&sectionid=351021504������
    • http://www.presstv.ir/detail.fa.aspx?id=130215&sectionid=351021504������
    • http://www.irna.ir/View/FullStory/?NewsId=1175587������
    • http://www.farsnews.com/newstext.php?nn=8903231714���������������
    • http://www.irna.ir/View/FullStory/?NewsId=1175455���������������
    • http://www.irna.ir/View/FullStory/?NewsId=1175575������������������������������
    • http://www.presstv.ir/detail.fa.aspx?id=130304&sectionid=351021507������������������
    • http://www.presstv.ir/detail.fa.aspx?id=130255&sectionid=351021507������
    • http://c6.community.alice.it/download/DownloaderActiveX.cab#Version=1,0,0,1

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000026d0.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x26D0 73272 bytes

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