C6 Messenger DownloaderActiveX PDF malware analysis — malicious · 60ec49bfb7555289

MALICIOUS

PDF

310.4 KB Created: 2011-05-17 08:56:39 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))

MD5: 389a79aa9c1109631bedb527bbd3f39e SHA-1: 8a2df283d1f66fa29a3324345b82f2b74fee4ca2 SHA-256: 60ec49bfb7555289573f1d10c98fd933b0ffa200cfe4c67eddfa7fb13ed33483

92 Risk Score

Malware Insights

C6 Messenger DownloaderActiveX · confidence 95%

MITRE ATT&CK

T1203 Exploitation for Client Execution

The critical heuristic firing for CVE-2008-2551 indicates the file is designed to exploit this vulnerability. The embedded URL points to a potential second-stage payload, system.exe, hosted on artisanballoonz.com. The ML classifier also strongly flagged this PDF as malicious, supporting the exploitation attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9577

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.

Filename	Kind	Source	Size
`stream_001_off0000040f.bin` `80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x40F	73272 bytes

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