C6 Messenger Downloader PDF malware analysis — malicious · 8657212fabf2207a

MALICIOUS

PDF

193.1 KB Created: 2011-05-26 15:09:15 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))

MD5: c497258c327c05d5bcc150a6dd9db9bf SHA-1: 070b98d22df9a6295ec6b1115b91cbc2825e9b76 SHA-256: 8657212fabf2207a8a411e0b560a7077f82c3170cfbd568f261c6ca2423cbfe7

92 Risk Score

Malware Insights

C6 Messenger Downloader · confidence 95%

MITRE ATT&CK

T1203 Exploitation for Client Execution

The PDF contains a marker for the C6 Messenger DownloaderActiveX exploit (CVE-2008-2551). It also contains an embedded URL pointing to a potential second-stage executable. The ML classifier also flagged this PDF as malicious with a high confidence score.

Machine Learning

Nyx PDF Classifier malicious score 0.8557

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_off00000595.bin` `80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x595	73272 bytes

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