Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfb3e9ad7f5d7b07…

MALICIOUS

PDF

44.9 KB Created: 2018-12-15 20:18:59 +03:00 Authoring application: Acrobat PDFMaker 9.0 for Word (via Acrobat Distiller 9.0.0 (Windows))
MD5: 23828d431a2da5eebee8acb50979438c SHA-1: 591764c1f7020406d43b056823716e5d16345e28 SHA-256: dfb3e9ad7f5d7b07f4d5e7bc030af2430db12cf723e60a22ff0b3b6645981080
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF was flagged by a machine learning classifier and contains a large number of embedded links to external PDF files, suggesting a link farm or SEO poisoning attack. The primary heuristic indicates a 'PDF_SEO_LINK_FARM' with 32 external links, predominantly hosted on 'www.gorillawalker.com'. No scripts were extracted, and the document body was heavily obfuscated, preventing a deeper 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/james-k-polk-our-eleventh-president-presidents-of-the-u.pdf
    • http://www.gorillawalker.com/manual-de-agility-para-principiantes-spanish-edition.pdf
    • http://www.gorillawalker.com/louis-wain-the-man-who-drew-cats-import.pdf
    • http://www.gorillawalker.com/simple-sequences-sequencing-colorcards.pdf
    • http://www.gorillawalker.com/handbook-of-thermal-spray-technology.pdf
    • http://www.gorillawalker.com/electric-energy-generation-economics-reliability-and-rates.pdf
    • http://www.gorillawalker.com/mcguffey-s-eclectic-readers-primer-through-the-sixth-revised-editions.pdf
    • http://www.gorillawalker.com/the-dog-diet-a-memoir-what-my-dog-taught-me.pdf
    • http://www.gorillawalker.com/contributions-to-north-american-ichthyology-volume-13.pdf
    • http://www.gorillawalker.com/on-rumors-how-falsehoods-spread-why-we-believe-them-and.pdf
    • http://www.gorillawalker.com/daddy-bill-didn-t-come-for-coffee-today.pdf
    • http://www.gorillawalker.com/black-pearls-daily-meditations-affirmations-and-inspirations-for-african-americans.pdf
    • http://www.gorillawalker.com/constitutional-law-cases-and-materials-14th-2014-supplement-university-casebook.pdf
    • http://www.gorillawalker.com/bobo-strategy-book-of-200-large-print-word-searches-the.pdf
    • http://www.gorillawalker.com/book-sidekick-the-valley-of-amazement.pdf
    • http://www.gorillawalker.com/the-sleepily-village-mysteries-1-kate-s-sexual-adventures.pdf
    • http://www.gorillawalker.com/arbol-adentro-biblioteca-breve-spanish-edition.pdf
    • http://www.gorillawalker.com/hypnosis-and-hypnotherapy-2-volume-set.pdf
    • http://www.gorillawalker.com/so-that-s-how-the-moon-changes-shape-rookie-read.pdf
    • http://www.gorillawalker.com/open-23-autonomy-new-forms-of-freedom-and-independence-in.pdf
    • http://www.gorillawalker.com/concepts-methods-and-data-sources-for-cumulative-health-risk-assessment.pdf
    • http://www.gorillawalker.com/polish-soups-kindle-edition.pdf
    • http://www.gorillawalker.com/hell-ship-a-dane-and-bones-origins-story-dane-maddock.pdf
    • http://www.gorillawalker.com/the-primitive-christian-catechism-a-study-in-the-epistles.pdf
    • http://www.gorillawalker.com/using-statistics-a-gentle-guide.pdf
    • http://www.gorillawalker.com/writing-a-college-handbook-fifth-edition.pdf
    • http://www.gorillawalker.com/the-control-of-the-arms-race-disarmament-and-arms-control.pdf
    • http://www.gorillawalker.com/baby-names-the-ultimate-collection-of-the-best-baby-names.pdf
    • http://www.gorillawalker.com/student-cd-for-professional-office-procedures.pdf
    • http://www.gorillawalker.com/stratagem-deception-and-surprise-in-war-artech-house-information-warfare.pdf
    • http://www.gorillawalker.com/the-cuisine-of-hungary.pdf
    • http://www.gorillawalker.com/smart-nutrients-dr-morton-walker-health-book.pdf
    • http://www.gorillawalker.com/practical-divinity-readings-in-wesleyan-theology-volume-two-practical-divinity.pdf
    • http://www.gorillawalker.com/selected-commercial-statutes-2014-selected-statutes.pdf
    • http://www.gorillawalker.com/an-exposition-of-the-epistle-to-the-hebrews-vol-iii.pdf
    • http://www.gorillawalker.com/the-year-long-day-one-man-s-arctic.pdf
    • http://www.gorillawalker.com/information-natural-laws-and-self-assembly-of-rhythmic-movement-resources.pdf
    • http://www.gorillawalker.com/insect-resistance-management-second-edition-biology-economics-and-prediction.pdf
    • http://www.gorillawalker.com/running-on-water-walking-on-air-kindle-edition.pdf
    • http://www.gorillawalker.com/my-favorite-earthling-otherworldly-men-book-2.pdf
    • http://www.gorillawalker.com/the-dog-diet-a-
    • 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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