Malicious PDF — malware analysis report

Static analysis result for SHA-256 51354b3d80830132…

MALICIOUS

PDF

44.1 KB Created: 2018-12-15 21:30:37 +03:00 Authoring application: LaTeX with hyperref package (via pdfTeX-1.40.10)
MD5: b6d9e1494a837f5b845e0dd16f13700d SHA-1: 2eb7e265702559a4895ae98d75050dd14ac85c0a SHA-256: 51354b3d80830132922ece24f8adedd36fa4ab2bffbef4c20ef70e6bd893f13d
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF contains a large number of embedded URLs, forming a link farm. This is indicative of a SEO poisoning or link-farming attack, where the PDF serves as a lure to drive traffic to external sites. The ML classifier also flagged this PDF as malicious with a high probability.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8683

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.gorillawalker.com/proust-pastiche-and-the-postmodern-or-why-style-matters.pdf
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    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://www.aiim.org/pdfa/ns/extension/
    • http://www.aiim.org/pdfa/ns/schema#
    • http://www.aiim.org/pdfa/ns/property#
    • http://www.aiim.org/pdfa/ns/id/