Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f54b5ff7db874f0…

MALICIOUS

PDF

44.2 KB Created: 2019-03-17 06:57:49 +03:00 Authoring application: Arbortext 5.4 (via PDFlib+PDI 7.0.4 (Win32))
MD5: da72a334a063022e154bb9f91f06d2a5 SHA-1: 9c62fc69bb5027861557b6528b705b1df45ea00c SHA-256: 5f54b5ff7db874f0431ae437735d6cf85a497e7913e97c12bfa158af0c5be653
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, identified by the 'PDF_SEO_LINK_FARM' heuristic. These links point to various PDF files on the 'gorillawalker.com' domain. The ML classifier also flagged the PDF as malicious. The presence of numerous links suggests an attempt to manipulate search engine results or to serve as a distribution point for other malicious content, rather than providing direct user value.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8224

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/midnight-secretary-vol-4.pdf
    • http://www.gorillawalker.com/origin-and-identity-essays-on-svevo-and-trieste-italian-perspectives.pdf
    • http://www.gorillawalker.com/the-connected-discourses-of-the-buddha-a-new-translation-of.pdf
    • http://www.gorillawalker.com/tips-tricks-and-techniques-to-bag-your-buck-every-deer.pdf
    • http://www.gorillawalker.com/tuttle-more-chinese-for-kids-flash-cards-traditional-character-includes.pdf
    • http://www.gorillawalker.com/chess-for-beginners.pdf
    • http://www.gorillawalker.com/stravinsky-bartok-and-more-vol-8-timp-perc-orchestra-musician.pdf
    • http://www.gorillawalker.com/critical-judgement.pdf
    • http://www.gorillawalker.com/the-eternal-enemy.pdf
    • http://www.gorillawalker.com/dk-eyewitness-travel-guide-vietnam-and-angkor-wat.pdf
    • http://www.gorillawalker.com/successful-service-operations-management-with-cd-rom.pdf
    • http://www.gorillawalker.com/amsco-s-integrated-algebra-i.pdf
    • http://www.gorillawalker.com/dolls-house-makeovers.pdf
    • http://www.gorillawalker.com/preventing-job-burnout-transforming-work-pressures-into-productivity.pdf
    • http://www.gorillawalker.com/radical-islam-in-america-salafism-s-journey-from-arabia-to.pdf
    • http://www.gorillawalker.com/chinese-cuisine-101.pdf
    • http://www.gorillawalker.com/behind-enemy-lines-the-true-story-of-a-french-jewish.pdf
    • http://www.gorillawalker.com/a-great-weekend-in-new-york-hachette-s-great-weekend.pdf
    • http://www.gorillawalker.com/alternate-assessments-based-on-alternate-achievement-standards-policy-practice-and.pdf
    • http://www.gorillawalker.com/laughter-an-essay-on-the-meaning-of-the-comic.pdf
    • http://www.gorillawalker.com/frithjof-the-viking-of-norway-and-roland-the-paladin-of.pdf
    • http://www.gorillawalker.com/7-generations-a-plains-cree-saga.pdf
    • http://www.gorillawalker.com/secrets-of-the-lost-mode-of-prayer-the-hidden-power.pdf
    • http://www.gorillawalker.com/2011-cumulative-supplement-to-burns-indiana-statutes-annotated-code-edition.pdf
    • http://www.gorillawalker.com/top-20-great-grammar-for-great-writing.pdf
    • http://www.gorillawalker.com/gobioid-fishes-of-india-memoirs-of-the-indian-museum.pdf
    • http://www.gorillawalker.com/windfall-the-end-of-the-affair.pdf
    • http://www.gorillawalker.com/guide-to-analysing-companies-third-edition.pdf
    • http://www.gorillawalker.com/homeschooling-for-success-how-parents-can-create-a-superior-education.pdf
    • http://www.gorillawalker.com/gay-breeding-of-the-alpha-male-mpreg-erotica-male-pregnancy.pdf
    • http://www.gorillawalker.com/saxon-math-course-3-solution-manual-2007.pdf
    • http://www.gorillawalker.com/blood-therapy-kismet-knight-vampire-psychologist-book-2.pdf
    • http://www.gorillawalker.com/shining-south-dungeon-dragons-d20-3-5-fantasy-roleplaying-forgotten.pdf
    • http://www.gorillawalker.com/good-housekeeping-light-healthy-recipes-150-delicious-appetizers-soups-main.pdf
    • http://www.gorillawalker.com/fifty-seven-songs-for-voice-and-piano.pdf
    • http://www.gorillawalker.com/igcse-english-as-a-second-language-cambridge-international-examinations.pdf
    • http://www.gorillawalker.com/easy-to-make-castle-dover-children-s-activity-books.pdf
    • http://www.gorillawalker.com/ophthalmic-plastic-surgery.pdf
    • http://www.gorillawalker.com/successful-living-with-lupus.pdf
    • http://www.gorillawalker.com/hillary-clinton-a-life-in-politics-people-to-know-today.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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