C6 Messenger Downloader PDF malware analysis — malicious · 8b26c9810f6a9577

MALICIOUS

PDF

256.0 KB Created: 2011-06-22 17:37:20 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))

MD5: 2fc3f27e4ddb3e6e3072ddd4e48ea19d SHA-1: 0dc34d403d7fbb16025e42ece9de822deaadb3ca SHA-256: 8b26c9810f6a9577ae269145ca873871f32025504d259aab52eeacf6ad782d5f

62 Risk Score

Malware Insights

C6 Messenger Downloader · confidence 90%

MITRE ATT&CK

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

The PDF contains a critical heuristic firing for the CVE-2008-2551 exploit, which is known to download and execute payloads. The embedded URL http://artisanballoonz.com/system/system.exe is highly suspicious and likely serves as the download location for the malicious payload. The PDF's metadata indicates it was generated by Joomla! via TCPDF, but this is likely a disguise for the exploit.

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_off0000039a.bin` `80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x39A	73272 bytes

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