C6 Messenger Downloader PDF malware analysis — malicious · 343842063c31ef4e

MALICIOUS

PDF

308.8 KB Created: 2011-06-22 18:36:26 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))

MD5: 53877b4e5790003c9b428e05fe941b01 SHA-1: 1d22d97acbc395c6c67bd43239fe698f7a2a93b0 SHA-256: 343842063c31ef4e610ac2c9c47605c9c90eb85957f0b6a3e9f47eb226146651

92 Risk Score

Malware Insights

C6 Messenger Downloader · confidence 90%

MITRE ATT&CK

T1203 Exploitation for Client Execution

The critical heuristic firing for CVE_2008_2551 indicates the exploitation of a vulnerability related to C6 Messenger DownloaderActiveX. The embedded URL http://artisanballoonz.com/system/system.exe is likely the secondary payload, and the benign-reputated URL http://c6.community.alice.it/download/DownloaderActiveX.cab#Version=1,0,0,1 may be related to the downloader itself. The ML classifier also flagged the PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.9561

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_off000003de.bin` `80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3DE	73272 bytes

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