Malicious PDF — malware analysis report

Static analysis result for SHA-256 180c1dd2fa79eb69…

MALICIOUS

PDF

43.4 KB Created: 2018-11-23 21:09:11 +03:00 Authoring application: ScanSnap Manager (via Acrobat Distiller 10.1.7 (Windows))
MD5: ac69ce40b4143daf9bf772393845e14c SHA-1: fd112d23f2aacb30985b2be85072d27bc100af64 SHA-256: 180c1dd2fa79eb69df4a73eebdfc191fb6be803f5a2c7402f9630762712fdad3
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged the document as malicious. While no scripts were extracted, the sheer volume of links suggests an attempt to manipulate search engine results or distribute potentially malicious content through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9171

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/prisoner-without-a-name-cell-without-a-number-the-americas.pdf
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    • http://www.gorillawalker.com/crescent-moon-vol-3.pdf
    • http://www.gorillawalker.com/summer-sky-kindle-edition.pdf
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    • http://www.gorillawalker.com/asterix-en-america-spanish-edition.pdf
    • http://www.gorillawalker.com/numerical-analysis-and-applied-mathematics-icnaam-2011-international-conference-of.pdf
    • http://www.gorillawalker.com/corticosteroids-and-peptide-hormones-in-hypertension-serono-symposia-publications-vol.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/