Malicious PDF — malware analysis report

Static analysis result for SHA-256 5613d4b9b0418210…

MALICIOUS

PDF

4.4 KB Created: 2015-06-03 16:39:13 +03:00 Authoring application: DOMPDF
MD5: 25018f584a678d40126715c9b5bcac0f SHA-1: 5ef556ed049b648f82aec2d46fff65cd56b44c72 SHA-256: 5613d4b9b0418210498eca83bd9b4103b06f6edca6737c313f13c0b46b6cb612
90 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains a significant number of external links, many of which are dynamically generated with query parameters. The document body, though truncated, also contains these links and text related to stock trading, suggesting a lure to engage the user. The primary attack pattern observed is the PDF SEO Link Farm heuristic, indicating a likely attempt to manipulate search engine results or redirect users to potentially malicious content via the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5320

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=1278
    • http://www.nibl.co.nz/index.php?2015/decision.pdf&angzv=1&aspx=16
    • http://www.kbb-gesellschaft.de/index.php?2015/ergoarena.pdf&urggv=1&aspx=2334
    • http://phcccolorado.org/index.php?2015/arabtera.pdf&effpp=1&aspx=1386
    • http://phcccolorado.org/index.php?2015/arabtera.pdf&effpp=1&aspx=1139
    • http://dyrlaegecentret.dk/index.php?2015/typestitch.pdf&hjhle=1&aspx=sitemap