C6 Messenger Downloader PDF malware analysis — malicious · 024229d20d50fbfb

MALICIOUS

PDF

71.7 KB Created: 2011-05-28 20:40:08 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))

MD5: 750f9176568f35adc9159897b8146ceb SHA-1: 66a18be4708fd897d1ee3fcc5c4dc689264a535f SHA-256: 024229d20d50fbfb8f5aef11e1be67523892f88f4c8db276d3171b13ded8ff7c

62 Risk Score

Malware Insights

C6 Messenger Downloader · confidence 90%

MITRE ATT&CK

T1203 Exploitation for Client Execution

The sample is a PDF file that contains an embedded exploit for CVE-2008-2551, targeting the DownloaderActiveX component. This exploit is designed to download and execute a secondary payload, identified by the URL http://artisanballoonz.com/system/system.exe. The presence of the exploit and the download URL strongly indicate a malicious intent to compromise the user's system.

Machine Learning

Nyx PDF Classifier suspicious score 0.4928

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_002_off00000bfb.bin` `80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xBFB	73272 bytes

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