Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ec0b4c6f5be70a0…

MALICIOUS

PDF

33.1 KB Created: 2019-11-23 19:52:27 +03:00 Authoring application: - (via GPL Ghostscript 8.70)
MD5: 0bccae1bd780867f1d41450763aa7d45 SHA-1: b344412081aa4eddaf9ea49e8b1f58b2262cba97 SHA-256: 3ec0b4c6f5be70a09b0f367c8c32f4097b742dca1e5413d299caeea7d937a97d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple heuristics, including a critical finding for a link farm containing 32 external PDF links. The ML classifier also indicated a high probability of maliciousness. The embedded URLs, primarily pointing to PDFs on www.gorillawalker.com, suggest a potential SEO manipulation or redirection scheme. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine the exact payload or user interaction required.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8529

Heuristics 3

  • 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.
  • ClamAV: Pdf.Dropper.Agent-9533182-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9533182-0
  • 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/food-waste-home-consumption-material-culture-and-everyday-life-materializing.pdf
    • http://www.gorillawalker.com/purcell-and-his-contemporaries-keyboard-pieces-by-masters-of-the.pdf
    • http://www.gorillawalker.com/manual-washington-de-especialidades-cl-nicas-neumolog-a-spanish-edition.pdf
    • http://www.gorillawalker.com/earth-and-space-science-universe-inquiry-based-learning-series-solar.pdf
    • http://www.gorillawalker.com/made-to-love-you-the-love-series-book-five-5.pdf
    • http://www.gorillawalker.com/classical-rhetoric-for-the-modern-student.pdf
    • http://www.gorillawalker.com/introduction-to-security-ninth-edition.pdf
    • http://www.gorillawalker.com/that-s-funny-pop-up-books-book-company.pdf
    • http://www.gorillawalker.com/2012-gooseberry-patch-recipe-card-calendar-gooseberry-patch-calendars.pdf
    • http://www.gorillawalker.com/international-economics-12th-edition-by-carbaugh-robert-published-by-south.pdf
    • http://www.gorillawalker.com/speech-production-and-speech-modelling-nato-science-series-d.pdf
    • http://www.gorillawalker.com/moshi-monsters-mad-libs.pdf
    • http://www.gorillawalker.com/finnish-phrase-book-dictionary-berlitz-phrase-books.pdf
    • http://www.gorillawalker.com/15-minute-body-fix-resize-your-thighs-blast-belly-fat.pdf
    • http://www.gorillawalker.com/mind-your-own-mortgage-the-wise-homeowner-s-guide-to.pdf
    • http://www.gorillawalker.com/washington-explore-the-united-states.pdf
    • http://www.gorillawalker.com/la-industria-textil-en-m-xico-otras-publicaciones-spanish-edition.pdf
    • http://www.gorillawalker.com/la-sombrilla-the-umbrella-spanish-edition.pdf
    • http://www.gorillawalker.com/berlitz-guide-cuba-berlitz-pocket-guides.pdf
    • http://www.gorillawalker.com/la-linternita-m-gica-the-magic-lantern-spanish-edition.pdf
    • http://www.gorillawalker.com/more-than-physical-the-physical-series-book-book-2.pdf
    • http://www.gorillawalker.com/test-of-integrated-language-and-literacy-skills-tills-quick-start.pdf
    • http://www.gorillawalker.com/tharp-and-young-on-ice-cream-an-encyclopedic-guide-to.pdf
    • http://www.gorillawalker.com/applied-equity-analysis-stock-valuation-techniques-for-wall-street-professionals.pdf
    • http://www.gorillawalker.com/hypastraxia-volume-ii-resistance.pdf
    • http://www.gorillawalker.com/with-their-own-blood-a-saga-of-southwestern-pioneers.pdf
    • http://www.gorillawalker.com/the-classical-guitar-book-a-complete-history-softcover.pdf
    • http://www.gorillawalker.com/chesuncook.pdf
    • http://www.gorillawalker.com/golf-the-mind-game.pdf
    • http://www.gorillawalker.com/rubbed-down-knocked-up-interracial-cuckold-erotica-a-cheating-wife.pdf
    • http://www.gorillawalker.com/masteringmicrobiology-with-pearson-etext-standalone-access-card-for-microbiology-with.pdf
    • http://www.gorillawalker.com/feminization-in-the-first-person-syndie-s-first-person-series.pdf
    • http://www.gorillawalker.com/dave-perewitz-chopper-master-and-king-of-flames.pdf
    • http://www.gorillawalker.com/female-pelvic-medicine-and-reconstructive-surgery.pdf
    • http://www.gorillawalker.com/transformative-change-an-introduction-to-peace-and-conflict-studies.pdf
    • http://www.gorillawalker.com/learning-php-5.pdf
    • http://www.gorillawalker.com/the-cultural-politics-of-austerity-past-and-present-in-austere.pdf
    • http://www.gorillawalker.com/grave-mercy-his-fair-assassin-book-i-his-fair-assassin.pdf
    • http://www.gorillawalker.com/the-queen-the-selection-the-selection-series.pdf
    • http://www.gorillawalker.com/forrest-general-medical-center-advanced-medical-transcription-course-with-audio.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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