Malicious PDF — malware analysis report

Static analysis result for SHA-256 4766a08444bd7f26…

MALICIOUS

PDF

43.2 KB Created: 2019-03-17 10:44:29 +03:00 Authoring application: - (via GNU Ghostscript 6.53)
MD5: 1d9e2ba7758dde509b449734d64b6cf0 SHA-1: cf05386f0e438e1536039cb1ddd2f6fa8539bd85 SHA-256: 4766a08444bd7f26c294cae811a8f8ac7c017369368310eec096c62b4d424765
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded URLs pointing to PDF files on the same domain, as detected by the PDF_SEO_LINK_FARM heuristic. This suggests a link farm or content distribution tactic. The ML classifier also flagged the document as malicious. No scripts were extracted from this sample, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8452

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-life-of-james-mcneill-whistler-v-2.pdf
    • http://www.gorillawalker.com/zagatsurvey-2000-2001-philadelphia-restaurants-zagatsurvey-philadelphia-restaurants-2000-2001.pdf
    • http://www.gorillawalker.com/john-dewey-suny-series-philosophy-of-education.pdf
    • http://www.gorillawalker.com/tourism-concepts-and-practices.pdf
    • http://www.gorillawalker.com/the-best-american-science-and-nature-writing-2003-the-best.pdf
    • http://www.gorillawalker.com/the-song-of-the-king-redesign.pdf
    • http://www.gorillawalker.com/brighton-blues-twelve-russian-tales-russian-edition.pdf
    • http://www.gorillawalker.com/i-wish-i-wish-i-was-a-fish.pdf
    • http://www.gorillawalker.com/fragile-dominion-complexity-and-the-commons-stanislaw-m-ulam-lecture.pdf
    • http://www.gorillawalker.com/deeply-odd-plus-bonus-digital-copy-of-deeply-odd-odd.pdf
    • http://www.gorillawalker.com/fifty-and-flying.pdf
    • http://www.gorillawalker.com/three-propositions-and-eleven-other-essays.pdf
    • http://www.gorillawalker.com/waste-to-energy-business-realities-and-prospects-for-green-growth.pdf
    • http://www.gorillawalker.com/prague-french-berlitz-pocket-gu-french-edition.pdf
    • http://www.gorillawalker.com/cardiovascular-physiology.pdf
    • http://www.gorillawalker.com/la-cara-oscura-de-la-luna-cazadores-oscuros-10-spanish.pdf
    • http://www.gorillawalker.com/the-noodle-maker-of-kalimpong-the-untold-story-of-my.pdf
    • http://www.gorillawalker.com/don-t-know-mind-the-spirit-of-korean-zen.pdf
    • http://www.gorillawalker.com/how-to-survive-anything-a-visual-guide-to-laughing-in.pdf
    • http://www.gorillawalker.com/mymathlab-for-trigsted-bodden-gallaher-beginning-intermediate-algebra-access-card.pdf
    • http://www.gorillawalker.com/michelin-local-map-number-312-essonne-paris-seine-et-marne.pdf
    • http://www.gorillawalker.com/the-americans-teacher-edition-2007.pdf
    • http://www.gorillawalker.com/getting-started-essentials-bike-maintenance-skills-and-speed-of-repair.pdf
    • http://www.gorillawalker.com/drawing-cartoon-portraits-blitz-cartoon-ser.pdf
    • http://www.gorillawalker.com/young-mothers-family-life-series.pdf
    • http://www.gorillawalker.com/horses-in-russian-art.pdf
    • http://www.gorillawalker.com/tassajara-cookbook.pdf
    • http://www.gorillawalker.com/cycles-of-influence-fiction-folktale-theory.pdf
    • http://www.gorillawalker.com/how-legendary-traders-made-millions-profiting-from-the-investment-strategies.pdf
    • http://www.gorillawalker.com/how-to-help-children-through-a-parent-s-serious-illness.pdf
    • http://www.gorillawalker.com/american-warlords-how-roosevelt-s-high-command-led-america-to.pdf
    • http://www.gorillawalker.com/stanfl-kt-en-s-lskapsresa-till-iran.pdf
    • http://www.gorillawalker.com/nutrition-an-applied-approach-4-e-print-replica-kindle-edition.pdf
    • http://www.gorillawalker.com/in-love-with-a-street-king.pdf
    • http://www.gorillawalker.com/does-your-doctor-charge-too-much-a-consumer-s-guide.pdf
    • http://www.gorillawalker.com/across-the-miles-the-not-so-bad-boys-of-rock.pdf
    • http://www.gorillawalker.com/mathcad.pdf
    • http://www.gorillawalker.com/resultats-des-campagnes-musorstom-vol-7-memoires-du-museum-national.pdf
    • http://www.gorillawalker.com/decorative-arts-patterns-to-colour.pdf
    • http://www.gorillawalker.com/the-body-self-cultivation-and-ki-energy-suny-series-body.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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