Malicious PDF — malware analysis report

Static analysis result for SHA-256 90f8eac264872dfa…

MALICIOUS

PDF

47.2 KB Created: 2018-12-02 10:55:04 +03:00 Authoring application: - (via Acrobat Distiller 5.0 (Windows))
MD5: 09dee6045a56e7bca3eda8f2f0b3fe5c SHA-1: e5a44104d39bd1d2e305371694a4f73bc5cbccba SHA-256: 90f8eac264872dfae97a0100563ec94f2b849eb304571dda16c93fd7b83d3329
90 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and contains a significant number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a mass of external PDF links, with 32 identified in this sample. The document body itself is heavily obfuscated and does not provide clear textual content, but the presence of numerous links to PDFs on the 'gorillawalker.com' domain suggests a link farm or redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8308

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/continuing-professional-development-in-the-lifelong-learning-sector.pdf
    • http://www.gorillawalker.com/law-school-exams-a-guide-to-better-grades-paperback-2012.pdf
    • http://www.gorillawalker.com/max-spaniel-dinosaur-hunt.pdf
    • http://www.gorillawalker.com/in-your-face-again-feng-shui.pdf
    • http://www.gorillawalker.com/step-up-to-usmle-step-2-ck-by-jonathan-p.pdf
    • http://www.gorillawalker.com/safe-practice-guide-personal-safety-skills-for-deaf-children.pdf
    • http://www.gorillawalker.com/the-wildlife-detectives-how-forensic-scientists-fight-crimes-against-nature.pdf
    • http://www.gorillawalker.com/don-quixote-texts-and-translations.pdf
    • http://www.gorillawalker.com/hockey-tough.pdf
    • http://www.gorillawalker.com/the-roman-textile-industry-and-its-influence.pdf
    • http://www.gorillawalker.com/jesus-a-brief-history.pdf
    • http://www.gorillawalker.com/marvel-heroclix-xplosion.pdf
    • http://www.gorillawalker.com/delicious-salad-dressing-recipes-essential-healthy-quick-easy-kindle-edition.pdf
    • http://www.gorillawalker.com/highlights-hidden-pictures-favorite-friendship-puzzles-favorite-hidden-pictures.pdf
    • http://www.gorillawalker.com/fly-fishing-the-bighorn-river-hatches-fly-patterns-access-and.pdf
    • http://www.gorillawalker.com/doctor-s-daughters.pdf
    • http://www.gorillawalker.com/wjec-eduqas-gcse-english-literature-romeo-and-juliet.pdf
    • http://www.gorillawalker.com/living-through-history-core-book-native-americans-indigenous-peoples-of.pdf
    • http://www.gorillawalker.com/teaching-children-to-read-the-teacher-makes-the-difference-enhanced.pdf
    • http://www.gorillawalker.com/addiction-and-change-how-addictions-develop-and-addicted-people-recover.pdf
    • http://www.gorillawalker.com/christmas-countdown-love-inspired-suspense.pdf
    • http://www.gorillawalker.com/a-new-synthesis-of-public-administration-serving-in-the-21st.pdf
    • http://www.gorillawalker.com/understand-basic-chemistry-concepts-the-periodic-table-chemical-bonds-naming.pdf
    • http://www.gorillawalker.com/flag-football-plays-the-easiest-most-powerful-flag-football-playbook.pdf
    • http://www.gorillawalker.com/common-stocks-and-uncommon-profits-and-other-writings.pdf
    • http://www.gorillawalker.com/ceux-d-algerie-le-silence-et-la-honte-documents-payot.pdf
    • http://www.gorillawalker.com/medical-devices-emergency-medical-services-annual-book-of-a-s.pdf
    • http://www.gorillawalker.com/guitar-notes.pdf
    • http://www.gorillawalker.com/bsava-introduction-to-veterinary-anatomy-and-physiology-bsava-british-small.pdf
    • http://www.gorillawalker.com/handbook-of-vitamins-fifth-edition.pdf
    • http://www.gorillawalker.com/d-is-for-down-under-an-australia-alphabet-discover-the.pdf
    • http://www.gorillawalker.com/mastering-unix-shell-scripting-bash-bourne-and-korn-shell-scripting.pdf
    • http://www.gorillawalker.com/the-life-and-poetry-of-ted-kooser.pdf
    • http://www.gorillawalker.com/united-arab-emirates-creation-of-the-modern-middle-east-hardcover.pdf
    • http://www.gorillawalker.com/governance-risk-management-and-compliance-it-can-t-happen-to.pdf
    • http://www.gorillawalker.com/cinderwetta-a-parody-adult-fairytale-watersports-story.pdf
    • http://www.gorillawalker.com/kentucky-colonels-of-the-american-basketball-association-the-real-story.pdf
    • http://www.gorillawalker.com/john-rawls-politischer-liberalismus-klassiker-auslegen-german-edition.pdf
    • http://www.gorillawalker.com/credit-risk-valuation-methods-models-and-applications-springer-finance.pdf
    • http://www.gorillawalker.com/baking-gluten-free-bread-quick-and-simple-recipes-for-baking.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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