Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a76a81b5d33b36f…

MALICIOUS

PDF

44.8 KB Created: 2019-03-17 09:58:44 +03:00 Authoring application: PDFpen
MD5: d7ac81d066cf7b0c1c2667667c085341 SHA-1: c597df6f1c3fa4e22cc923b6e51193acbde442cc SHA-256: 8a76a81b5d33b36f63074a20b076b59d1bab9940387df80e3de85b7f933217dd
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links pointing to external PDF files, a technique often used for SEO manipulation or to distribute further malicious content. The ML classifier also flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

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/developing-helping-skills-a-step-by-step-approach.pdf
    • http://www.gorillawalker.com/constantine-the-great-the-reorganisation-of-the-empire-and-triumph.pdf
    • http://www.gorillawalker.com/aristotle-s-empiricism-experience-and-mechanics-in-the-4th-century.pdf
    • http://www.gorillawalker.com/bates-nursing-guide-to-physical-examination-and-history-taking-student.pdf
    • http://www.gorillawalker.com/ozark-whitewater.pdf
    • http://www.gorillawalker.com/medical-terminology-simplified-3rd-ed-taber-146-s-cyclopedic-medical.pdf
    • http://www.gorillawalker.com/disclosing-hiv-aids-to-children-the-paths-we-take.pdf
    • http://www.gorillawalker.com/greater-the-expectations-greater-the-achievements-a-guide-on-using.pdf
    • http://www.gorillawalker.com/hiroshi-jin-disco-dance-sexy-disco-jin-hiroshi-no-disco.pdf
    • http://www.gorillawalker.com/the-unwavering-resolve-of-jonathan-edwards-long-line-of-godly.pdf
    • http://www.gorillawalker.com/illustrated-historical-atlas-of-the-state-of-iowa-1875.pdf
    • http://www.gorillawalker.com/the-mission-of-love-a-sacramental-journey-to-marital-success.pdf
    • http://www.gorillawalker.com/out-the-vermont-secession-book.pdf
    • http://www.gorillawalker.com/modern-scandinavian-literature-african-latin-american-and-other-european-literature.pdf
    • http://www.gorillawalker.com/an-irish-country-doctor-a-novel-unabridged-audible-audio-edition.pdf
    • http://www.gorillawalker.com/the-annual-report-of-the-connecticut-historical-society-volume-4.pdf
    • http://www.gorillawalker.com/labor-and-laborers-of-the-loom-mechanization-and-handloom-weavers.pdf
    • http://www.gorillawalker.com/home-to-italy.pdf
    • http://www.gorillawalker.com/more-of-the-easy-60s-fake-book.pdf
    • http://www.gorillawalker.com/the-automotive-competitiveness-review-a-report-on-the-canadian-automotive.pdf
    • http://www.gorillawalker.com/advanced-ceramic-coatings-and-interfaces-ceramic-engineering-and-science-proceedings.pdf
    • http://www.gorillawalker.com/choreography-a-basic-approach-using-improvisation-3rd-edition-pb-2007.pdf
    • http://www.gorillawalker.com/the-complete-photo-guide-to-framing-and-displaying-artwork-500.pdf
    • http://www.gorillawalker.com/all-better-now.pdf
    • http://www.gorillawalker.com/collection-of-icc-arbitral-awards-1991-1995-collection-of-icc.pdf
    • http://www.gorillawalker.com/letters-of-st-therese-of-lisieux-volume-ii-general-correspondence.pdf
    • http://www.gorillawalker.com/why-is-he-so-mean-to-me.pdf
    • http://www.gorillawalker.com/donde-viven-los-monstruos-where-the-wild-things-are-turtleback.pdf
    • http://www.gorillawalker.com/knowledge-of-higher-worlds-rudolf-steiner-s-blackboard-drawings.pdf
    • http://www.gorillawalker.com/ghosting-pavad-fbi-romantic-suspense-book-10.pdf
    • http://www.gorillawalker.com/great-hunter-spiritual-prey-called-predator-poetry-poem-an-article.pdf
    • http://www.gorillawalker.com/performance-analysis-of-flow-lines-with-non-linear-flow-of.pdf
    • http://www.gorillawalker.com/eels-physiology-habitat-and-conservation-marine-biology.pdf
    • http://www.gorillawalker.com/parian-ware-copeland-s-statuary-porcelain.pdf
    • http://www.gorillawalker.com/aanteekeningen-over-het-dorp-stramproy-eene-bijdrage-tot-de-geschiedenis.pdf
    • http://www.gorillawalker.com/experience-human-development.pdf
    • http://www.gorillawalker.com/fire-up-your-team.pdf
    • http://www.gorillawalker.com/step-parenting.pdf
    • http://www.gorillawalker.com/constraints-and-opportunities-of-leadership-in-post-communist-europe.pdf
    • http://www.gorillawalker.com/international-construction-costs-and-reference-data-yearbook.pdf
    • 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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