Malicious PDF — malware analysis report

Static analysis result for SHA-256 56873efef2731db9…

MALICIOUS

PDF

334.8 KB Created: 2011-05-28 19:44:47 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: ffcac71ecacf9258deef8eaf4c2f4c71 SHA-1: 5746f68e4338c5ebe49761097ab1d76465329a4e SHA-256: 56873efef2731db9992e3572e77d5cfe2733d0f710d5622e48b805a8589729e2
60 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.001 PowerShell

The sample is a PDF document that contains a critical heuristic firing for CVE_2008_2551, indicating an exploit for the C6 Messenger DownloaderActiveX. This exploit likely facilitates the download of a secondary payload. An embedded URL, http://artisanballoonz.com/system/system.exe, is present and marked as unknown reputation, suggesting it is the likely source of the malicious payload. The document body is heavily obfuscated and unreadable, providing no further context on the lure.

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_off00000420.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x420 73272 bytes