C6 Messenger Downloader PDF malware analysis — malicious · 2672b4fbd2cab529

MALICIOUS

PDF

296.8 KB Created: 2011-04-27 02:38:14 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))

MD5: 7dac0b9f7f7c52328f927e8bd24c3f53 SHA-1: ebd3a56bd294e1d3cdc5219cc8821ad8b73d2093 SHA-256: 2672b4fbd2cab529a8a7d677208663e184f252767f73d8836b6ca5fda2352ad8

60 Risk Score

Malware Insights

C6 Messenger Downloader · confidence 90%

MITRE ATT&CK

T1204.001 Malicious Link/Script: User Execution: Malicious Link

The critical heuristic firing for CVE_2008_2551 indicates the sample is designed to exploit this vulnerability. The embedded URL http://artisanballoonz.com/system/system.exe is likely the source of the second-stage payload. The PDF structure and exploit marker at offset 0x4A258 further support this attack pattern.

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_off0000042f.bin` `80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x42F	73272 bytes

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