C6 Messenger Downloader PDF malware analysis — malicious · 0429da2d9fa0285f

MALICIOUS

PDF

872.0 KB Created: 2011-04-27 03:27:46 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))

MD5: 01e31e118b26c0e2afa277b9f25070fa SHA-1: 46638261b874c2d4c7a4e7199288fe41465cef80 SHA-256: 0429da2d9fa0285f420c07d75c348283074215a75f85302781d6cc877724ed01

92 Risk Score

Malware Insights

C6 Messenger Downloader · confidence 95%

MITRE ATT&CK

T1203 Exploitation for Client Execution

The PDF contains an embedded exploit for CVE-2008-2551, identified as the C6 Messenger DownloaderActiveX exploit. This exploit is designed to download and execute a secondary payload from a remote URL. The heuristic firings and the presence of an executable URL strongly indicate this malicious behavior.

Machine Learning

Nyx PDF Classifier malicious score 0.9750

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_002_off000007b9.bin` `80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x7B9	73272 bytes

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