Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af6c921e8f16a5b…

MALICIOUS

PDF

5.0 KB Created: 2015-06-03 17:00:56 +03:00 Authoring application: DOMPDF
MD5: 189deefce1c6b9b746b5d2fa436b41ca SHA-1: 27e9d7aeddae0405048e93969ea81a6edcd941d9 SHA-256: 4af6c921e8f16a5b8a8b9304a3100a09d3340e9b353cf9d02e896155000d1c58
60 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious due to a critical heuristic firing for PDF_SEO_LINK_FARM, indicating a large number of external links. The document body contains numerous URLs, many of which are repeated, suggesting an attempt to manipulate search engine results or direct users to potentially harmful websites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier clean score 0.1330

Heuristics 2

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.nibl.co.nz/index.php?2015/decision.pdf&angzv=1&aspx=1396
    • http://phcccolorado.org/index.php?2015/arabtera.pdf&effpp=1&aspx=1114
    • http://www.nibl.co.nz/index.php?2015/decision.pdf&angzv=1&aspx=1370
    • http://arquiteturaemarketing.com.br/index.php?2015/endurancelab.pdf&hjlcw=1&aspx=1635
    • http://www.chateauderaousset.com/index.php?2015/assets.pdf&iukpl=1&aspx=342
    • http://veranomusical.es/index.php?2015/booboodigital.pdf&ieycq=1&aspx=sitemap

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