C6 Messenger Downloader — PDF malware analysis

Static analysis result for SHA-256 c68e08f5459acdee…

MALICIOUS

PDF

51.5 KB Created: 2011-04-16 14:19:03 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: fbb46f868a9e044cd0f08c3ee3da40ca SHA-1: e49ef8e5459876d9d8677c298899b5ebf3df4efb SHA-256: c68e08f5459acdeed35de183c34a7cedf8dd72f613d1f17db34866fc37c2af91
62 Risk Score

Malware Insights

C6 Messenger Downloader · confidence 95%

MITRE ATT&CK
T1204.002 Malicious File

The PDF file contains a critical heuristic indicating the CVE-2008-2551 exploit, which is associated with the C6 Messenger Downloader. This exploit is designed to download and execute a secondary payload from a remote URL. The presence of the DownloaderActiveX.cab file and a suspicious executable URL further supports this attack pattern. The primary IOC is the URL pointing to the executable payload.

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=840728
    • http://www.farsnews.com/newstext.php?nn=8809221138
    • http://www.irna.ir/View/FullStory/?NewsId=839237
    • http://www.farsnews.com/newstext.php?nn=8809221807
    • 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_001_off00000fe2.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xFE2 73272 bytes

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