C6 Messenger Downloader PDF malware analysis — malicious · 7b265322cc506686

MALICIOUS

PDF

50.3 KB Created: 2011-04-23 06:40:04 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))

MD5: 8bd1f77403dc850e9d8041c09ece4507 SHA-1: d3630912fb749833c4001b021286137afb5bc1b0 SHA-256: 7b265322cc506686996f8a768194bc103a99f62545d093dbc51ea11e6b0ccd8a

92 Risk Score

Malware Insights

C6 Messenger Downloader · confidence 85%

MITRE ATT&CK

T1203 Exploitation for Client Execution

The critical heuristic firing for CVE_2008_2551 indicates the sample exploits a vulnerability to download and execute a payload. The embedded URL points to a CAB file, likely containing an ActiveX control, and another URL suggests a Windows executable payload. The ML classifier also flagged the PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.6105

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_off00000b5a.bin` `80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xB5A	73272 bytes

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