C6 Messenger Downloader PDF malware analysis — malicious · 06b5fd4a6249d0ed

MALICIOUS

PDF

50.5 KB Created: 2011-06-22 17:25:25 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))

MD5: 2a3a35f42d17ed8978889e47a7d66a63 SHA-1: 50a3f50d9b6c44fb99065bf3e503432b369d4ae4 SHA-256: 06b5fd4a6249d0edbdd426681f46b86ffa18aa426130d1945945442b72345d4d

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 second-stage payload from a remote URL. The presence of the 'system.exe' URL strongly suggests this is the intended payload.

Machine Learning

Nyx PDF Classifier malicious score 0.6105

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_off00000c05.bin` `80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xC05	73272 bytes

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