C6 Messenger Downloader PDF malware analysis — malicious · b00713b369307b67

MALICIOUS

PDF

201.8 KB Created: 2011-06-22 17:01:24 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))

MD5: 9d8a06768f80c86e90f63f87ceaff1ce SHA-1: d62890aa133f4b75b46e1db5008bae76ecc7dae4 SHA-256: b00713b369307b6757ffbb074dacf7ef3398ae0fd4898973ebe59db8bc559bf7

62 Risk Score

Malware Insights

C6 Messenger Downloader · confidence 85%

The sample is a PDF file that contains a critical heuristic firing for the CVE_2008_2551 exploit, which is known to download and execute payloads. The embedded URL points to a CAB file, likely containing the exploit and a downloader. The file also contains an embedded URL that resolves to a .exe file, indicating a download and execution chain. The C6 Messenger Downloader family is associated with this exploit.

Heuristics 3

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.
External URI info PDF_URI

PDF contains an external URL action
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://prayer.aviny.com/city_time.aspx?Code=151&Y=1388&M=6&D=1
- 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_002_off00000795.bin` `80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x795	73272 bytes

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