C6 Messenger Downloader — PDF malware analysis

Static analysis result for SHA-256 04db7caf9a5e0362…

MALICIOUS

PDF

49.8 KB Created: 2011-05-17 08:44:39 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: c18ba4e518c7a7b0f7855e5d8f880dbf SHA-1: 8131357a7fa45eb109e1249586c33fc2fa6e2365 SHA-256: 04db7caf9a5e0362b35e213c4e5651069227163f075858c15518ad7e707f6e45
64 Risk Score

Malware Insights

C6 Messenger Downloader · confidence 95%

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is a PDF file that contains a known exploit (CVE_2008_2551) for C6 Messenger Downloader. This exploit is designed to download and execute a second-stage payload from a remote URL. The embedded URL 'http://artisanballoonz.com/system/system.exe' is highly suspicious and likely the location of the payload.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2677

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://www.vije.javananeirani.ir/
    • http://www.vije.javananeirani.ir/������
    • 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.

FilenameKindSourceSize
stream_002_off0000088f.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x88F 73272 bytes

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