Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ea9786c6d7e9e75…

MALICIOUS

PDF

48.6 KB Created: 2011-04-27 03:02:19 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: f3b501436b7edaec8194578730f6771e SHA-1: 31f42e04143546cc0c6a4dc95d6e1b6b7dc792d1 SHA-256: 6ea9786c6d7e9e75e326ea3e05186942810ddb124d302ee64cc71e8bb4293a44
62 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is a PDF file that contains a critical heuristic firing for CVE-2008-2551, indicating an exploit for a known vulnerability. This exploit is designed to download and execute a secondary payload, identified by the embedded URL http://artisanballoonz.com/system/system.exe. The other embedded URL, http://c6.community.alice.it/download/DownloaderActiveX.cab, is also listed as an embedded URL.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2737

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.

FilenameKindSourceSize
stream_001_off0000045e.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x45E 73272 bytes

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