Malicious PDF — malware analysis report

Static analysis result for SHA-256 af72cc4a51ceab21…

MALICIOUS

PDF

45.0 KB Created: 2018-12-07 18:27:27 +03:00 Authoring application: Word (via Mac OS X 10.10.5 Quartz PDFContext)
MD5: 1913e60c6268ba43781c1eb590fbaa39 SHA-1: 1a9a422bd57bd6e29f9864022fdc76ba0fa8f807 SHA-256: af72cc4a51ceab2183f8e5fb6ef211d6c4e346f7f466e3532e2b48b2b0d679dd
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO manipulation or to distribute malicious content. The ML classifier also flagged this PDF as malicious. No scripts were extracted from this sample, and the document body was heavily obfuscated, preventing a deeper analysis of its specific intent beyond linking to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8812

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/descent-of-socrates-self-knowledge-and-cryptic-nature-in-the.pdf
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    • http://www.gorillawalker.com/jasmine-on-a-string-a-survey-of-women-writing-english.pdf
    • http://www.gorillawalker.com/children-from-alcoholic-families-family-matters-book-9-kindle-edition.pdf
    • http://www.gorillawalker.com/charlie-smithers-adventures-in-india.pdf
    • http://www.gorillawalker.com/una-queja-es-un-favor-como-utilizar-los-comentarios-de.pdf
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    • http://www.gorillawalker.com/canine-and-feline-cardiac-arrythmias-self-assesment.pdf
    • http://www.gorillawalker.com/henry-and-mudge-and-the-forever-sea.pdf
    • http://www.gorillawalker.com/manual-of-pediatric-nursing-careplans-a-little-brown-spiral-manual.pdf
    • http://www.gorillawalker.com/the-eight-core-values-of-the-japanese-businessman-toward-an.pdf
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    • http://www.gorillawalker.com/rigby-on-our-way-to-english-bookroom-package-grade-1.pdf
    • http://www.gorillawalker.com/the-country-club-acting-edition.pdf
    • http://www.gorillawalker.com/how-to-behave-and-why.pdf
    • http://www.gorillawalker.com/the-totorore-voyage-an-antarctic-adventure.pdf
    • http://www.gorillawalker.com/tropical-forests-management-and-ecology-ecological-studies.pdf
    • http://www.gorillawalker.com/the-brothers-karamazov-library-edition-audio-cds.pdf
    • http://www.gorillawalker.com/understanding-supreme-court-opinions-value-pack-w-mysearchlab-6th-edition.pdf
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    • http://www.gorillawalker.com/kaizen-for-couples-smart-steps-to-save-sustain-strengthen-your.pdf
    • http://www.gorillawalker.com/curso-practico-de-astrologia-vol-3-volume-3-spanish-edition.pdf
    • http://www.gorillawalker.com/some-kind-of-genius-the-extraordinary-journey-of-musical-savant.pdf
    • http://www.gorillawalker.com/mobilities.pdf
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    • http://www.gorillawalker.com/identification-of-mineral-resources-in-afghanistan-detecting-and-mapping-res
    • 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/

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