Malicious PDF — malware analysis report

Static analysis result for SHA-256 72aae3a3c30c837b…

MALICIOUS

PDF

45.2 KB Created: 2018-11-30 20:23:38 +03:00 Authoring application: AH Formatter V5.3 MR1 for Windows (via Acrobat Distiller 8.1.0 (Windows))
MD5: 3ac187afe13d2df451c9f129ade4d2f6 SHA-1: 0969faf494ee66ae9a341893d6576fa3de100516 SHA-256: 72aae3a3c30c837b5395cd895b9e30aa604c2ac9a93b9adaacfe72557f207589
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 from this sample, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8439

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/the-fab-five-college-kids-who-made-a-statement-kindle.pdf
    • http://www.gorillawalker.com/mechanical-fastening-of-plastics-an-engineering-handbook-mechanical-engineering-26.pdf
    • http://www.gorillawalker.com/no-experience-required-water-soluble-oils.pdf
    • http://www.gorillawalker.com/the-sampling-and-initial-preparation-of-sewage-and-waterworks-sludges.pdf
    • http://www.gorillawalker.com/critical-pathways-in-cardiovascular-medicine-board-review.pdf
    • http://www.gorillawalker.com/new-frontiers-modern-perspectives-on-our-solar-system-the-great.pdf
    • http://www.gorillawalker.com/the-chess-mysteries-of-the-arabian-knights.pdf
    • http://www.gorillawalker.com/costa-rica-travel-reference-map-1-300-000-international-travel.pdf
    • http://www.gorillawalker.com/soil-microbiology-ecology-and-biochemistry-third-edition.pdf
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    • http://www.gorillawalker.com/chicken-boy-a-super-hero-with-autism-deals-with-doctors.pdf
    • http://www.gorillawalker.com/expert-internet-searching-fourth-edition.pdf
    • http://www.gorillawalker.com/100-greats-gloucestershire-county-cricket-club.pdf
    • http://www.gorillawalker.com/core-concepts-for-law-enforcement-management-preparation-resource-for-promotional.pdf
    • http://www.gorillawalker.com/diamonds-and-spurs-the-callens-9-siren-publishing-menage-everlasting.pdf
    • http://www.gorillawalker.com/the-green-game.pdf
    • http://www.gorillawalker.com/84-recetas-con-pastas-exquisitas-maneras-de-preparar-pastas-con.pdf
    • http://www.gorillawalker.com/winetrails-of-washington-2nd-edition.pdf
    • http://www.gorillawalker.com/the-immortal-class-bike-messengers-and-the-cult-of-human.pdf
    • http://www.gorillawalker.com/creative-aromatherapy.pdf
    • http://www.gorillawalker.com/soldier-boy-hanigan-kindle-edition.pdf
    • http://www.gorillawalker.com/air-commandos-against-japan-allied-special-operations-in-world-war.pdf
    • http://www.gorillawalker.com/a-royal-affair.pdf
    • http://www.gorillawalker.com/21-plan-for-university-teaching-in-civil-and-commercial-law.pdf
    • http://www.gorillawalker.com/julische-alpen-1-50k-hiking-map-fb-wk141-slovenia-wanderkarte.pdf
    • http://www.gorillawalker.com/nashville-songwriter-the-inside-stories-behind-country-music-s-greatest.pdf
    • http://www.gorillawalker.com/essay-on-mind.pdf
    • http://www.gorillawalker.com/the-creeps-a-samuel-johnson-tale.pdf
    • http://www.gorillawalker.com/the-same-and-not-the-same.pdf
    • http://www.gorillawalker.com/sea-kayaking-rough-waters-by-matthews-alex-2011-paperback.pdf
    • http://www.gorillawalker.com/mineral-water-interface-geochemistry-vol-23.pdf
    • http://www.gorillawalker.com/history-of-the-medical-teaching-in-trinity-college-dublin-and.pdf
    • http://www.gorillawalker.com/boxers-2016-square-12x12-multilingual-edition.pdf
    • http://www.gorillawalker.com/introduction-to-finite-mathematics-prentice-hall-mathematics-series.pdf
    • http://www.gorillawalker.com/tight-tone-and-trim-how-to-get-rid-of-cankles.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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