C6 Messenger Downloader PDF malware analysis — malicious · 0c6290e83d135c24

MALICIOUS

PDF

49.2 KB Created: 2011-06-22 18:07:30 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))

MD5: 5a64bbcb4d9718a6e9d465c8ee0bfe66 SHA-1: 0b0b72002298237954b41ac2f3f1ccd76a09e640 SHA-256: 0c6290e83d135c240f7bd56aa8fd9c005c1f9dd0e8977ba9671b1521941b4115

62 Risk Score

Malware Insights

C6 Messenger Downloader · confidence 85%

MITRE ATT&CK

T1203 Exploitation for Client Execution

The sample contains a critical heuristic indicating the CVE-2008-2551 exploit, which is associated with the C6 Messenger Downloader. This exploit is designed to download and execute a secondary payload, identified by the URL http://artisanballoonz.com/system/system.exe. An additional embedded URL, http://c6.community.alice.it/download/DownloaderActiveX.cab#Version=1,0,0,1, was also found.

Machine Learning

Nyx PDF Classifier suspicious score 0.2843

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_off00000641.bin` `80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x641	73272 bytes

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