Malicious PDF — malware analysis report

Static analysis result for SHA-256 f48bbe769a8c7b7d…

MALICIOUS

PDF

629.8 KB Created: 2011-06-22 18:15:45 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: e0446c858488aced88d87647c88d7111 SHA-1: c23b5bd869ad380cc23496987a4c4ac1e295b445 SHA-256: f48bbe769a8c7b7d49a6898cf132ed4e24cc3653c89dcaf271e90ba4ddec111f
78 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File

The critical heuristic firing for CVE_2008_2551 indicates the PDF exploits a known vulnerability to download and execute a payload. The embedded URL http://artisanballoonz.com/system/system.exe is likely the secondary payload. The presence of embedded JavaScript and an optional content group with an action trigger further support the malicious intent.

Heuristics 4

  • 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 JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Optional Content Group with action trigger low PDF_OPTIONAL_CONTENT
    Optional Content Group (layer) co-occurs with an action trigger — content can be selectively hidden from viewers or scanners while the action still fires on open
  • 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_002_off000006af.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x6AF 73272 bytes