C6 Messenger Downloader PDF malware analysis — malicious · a0cb87b18ce42e4f

MALICIOUS

PDF

323.1 KB Created: 2011-05-17 08:51:14 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))

MD5: ca6edcdcfe5d091f775acb785c5f0b38 SHA-1: b0ba5beabe5f4ae10cd7a27dd32a2efc196d45e7 SHA-256: a0cb87b18ce42e4f52a39a674dd0eb13d3938f3099a3491392fb52a46596cf85

60 Risk Score

Malware Insights

C6 Messenger Downloader · confidence 90%

MITRE ATT&CK

T1204.001 Malicious Link/Object: User Execution

The critical heuristic firing for CVE_2008_2551 indicates the file is designed to exploit this vulnerability. The embedded URL 'http://artisanballoonz.com/system/system.exe' is likely the location of the second-stage payload. The PDF structure and exploit marker at offset 0x50B7B 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_off00000418.bin` `80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x418	73272 bytes

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