C6 Messenger Downloader PDF malware analysis — malicious · 5c4b9c7d09144ea6

MALICIOUS

PDF

49.2 KB Created: 2011-06-22 18:34:17 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))

MD5: ad26fe9e6b3d733cf350c179f4e62446 SHA-1: 2b66b024fa027c116897e44f3295a93a82b52778 SHA-256: 5c4b9c7d09144ea69eabd4a8587a43d8ee9420d89f291db4b4a7253f15182104

62 Risk Score

Malware Insights

C6 Messenger Downloader · confidence 90%

MITRE ATT&CK

T1203 Exploitation for Client Execution

The PDF contains a marker for the CVE-2008-2551 exploit, which is known to download and execute payloads. The embedded URL http://artisanballoonz.com/system/system.exe likely points to the secondary payload. The other embedded URL is confirmed benign.

Machine Learning

Nyx PDF Classifier suspicious score 0.2812

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_off000006ea.bin` `80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x6EA	73272 bytes

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