C6 Messenger Downloader PDF malware analysis — malicious · d82e5decce48eb44

MALICIOUS

PDF

56.4 KB Created: 2011-04-22 21:34:43 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))

MD5: 53b429649da50956f6c9acb13fedfd51 SHA-1: 85e627ebb51124884ce6c06999ca599b02978346 SHA-256: d82e5decce48eb441910c75d98b78817965b1b9851ca24f7cc5d739f1165333c

60 Risk Score

Malware Insights

C6 Messenger Downloader · confidence 90%

MITRE ATT&CK

T1204.001 Malicious Link/Object: User Execution

The sample is a PDF document that contains a critical heuristic firing for the CVE-2008-2551 C6 Messenger DownloaderActiveX exploit. This exploit is designed to download and execute a payload from a specified URL. The embedded URL 'http://artisanballoonz.com/system/system.exe' is highly suspicious and likely serves as the second-stage payload. The document body is heavily obfuscated and does not provide further clues.

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_009_off0000220a.bin` `80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x220A	73272 bytes

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