Malicious PDF — malware analysis report

Static analysis result for SHA-256 321eba29261f19b2…

MALICIOUS

PDF

402.6 KB Created: 2011-06-22 18:10:57 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: 7582099273b1f199e97b28df812e88db SHA-1: 9157cd15ec29540eede479b105d9de0fd56a9c0b SHA-256: 321eba29261f19b2fdc15d343ac0fee044f82040b60cdeff2b1f63d9bb3cad92
60 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample contains a marker for the CVE-2008-2551 C6 Messenger DownloaderActiveX exploit. It also embeds a URL that points to a potential second-stage executable. The document body is heavily obfuscated and does not provide clear user-facing content, but the exploit and embedded URL strongly suggest a downloader pattern.

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_off000003e2.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3E2 73272 bytes

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