C6 Messenger Downloader — PDF malware analysis

Static analysis result for SHA-256 da1af688ab4f46a4…

MALICIOUS

PDF

54.0 KB Created: 2011-04-27 02:52:22 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: 7172f24d68df4f1605c3e37f85a2cea1 SHA-1: bbdcec7e7cbef5d8a0c9330a39c720d08cff555a SHA-256: da1af688ab4f46a4417a92aa65ade1021da9c02fadce16f68035b26bcb6cd195
62 Risk Score

Malware Insights

C6 Messenger Downloader · confidence 95%

MITRE ATT&CK
T1204.002 Malicious File

The PDF file contains a marker for the CVE-2008-2551 C6 Messenger DownloaderActiveX exploit. This exploit is designed to download and execute a secondary payload from a specified URL. The presence of the exploit and an unknown reputation URL strongly suggests this is a downloader for further malicious activity.

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.irna.ir/View/FullStory/?NewsId=831410
    • http://www.irna.ir/View/FullStory/?NewsId=831244
    • http://www.irna.ir/View/FullStory/?NewsId=832138
    • http://www.irna.ir/View/FullStory/?NewsId=833016
    • http://www.farsnews.com/newstext.php?nn=8809171838
    • http://www.irna.ir/View/FullStory/?NewsId=830786
    • http://www.presstv.ir/Persian.aspx?id=6413
    • 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_002_off000019a1.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x19A1 73272 bytes

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