C6 Messenger DownloaderActiveX — PDF malware analysis

Static analysis result for SHA-256 11b51a9f1c4837d0…

MALICIOUS

PDF

49.1 KB Created: 2011-06-22 16:21:43 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: cc03cad1fc456ebe99041b0fc5600024 SHA-1: 9938d6b6a3d6e623171adc8fa7f9807acaeda0c6 SHA-256: 11b51a9f1c4837d0dabc3663cf5af25ee22e994162fade64318fdf521d3542a3
62 Risk Score

Malware Insights

C6 Messenger DownloaderActiveX · confidence 85%

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample exploits the CVE-2008-2551 vulnerability, indicated by the 'C6 Messenger DownloaderActiveX exploit' heuristic. This exploit is designed to download and execute a secondary payload, identified by the URL http://artisanballoonz.com/system/system.exe. The presence of an embedded URL related to DownloaderActiveX further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2843

Heuristics 2

  • 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.
  • 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://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_off000005fd.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5FD 73272 bytes

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