Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c79fc2f6b526a7a…

MALICIOUS

PDF

43.1 KB Created: 2018-11-30 20:34:02 +03:00 Authoring application: PrimoPDF http://www.primopdf.com (via Nitro PDF PrimoPDF)
MD5: 0ce12103af5bf9f2c985becd7fbbd103 SHA-1: e5f0d11cab962978c3397dca639933fc22006b96 SHA-256: 3c79fc2f6b526a7aded4a2742bcb1fed5085b364b36217ce7ef2d8eea0fab357
90 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains a large number of embedded URLs pointing to external PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious. The document body was heavily obfuscated and unreadable, preventing a more detailed analysis of its specific lure. The primary attack pattern observed is the mass linking to external resources, likely for SEO manipulation or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8872

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/amish-christmas-baby-book-one-amish-secrets-1-kindle-edition.pdf
    • http://www.gorillawalker.com/toponymity-an-atlas-of-words.pdf
    • http://www.gorillawalker.com/engels-a-very-short-introduction-very-short-introductions.pdf
    • http://www.gorillawalker.com/the-old-editor-says-maxims-for-writing-and-editing.pdf
    • http://www.gorillawalker.com/how-to-pass-elite-forces-selection-elite-forces-survival-guides.pdf
    • http://www.gorillawalker.com/be-aggressive-with-posttransplant-skin-cancer-cancer-risk-greatly-increased.pdf
    • http://www.gorillawalker.com/la-vita-nuova.pdf
    • http://www.gorillawalker.com/officer-ruger-k-9-detective-kindle-edition.pdf
    • http://www.gorillawalker.com/los-angeles-99-the-complete-guide-to-hollywood-beverly-hills.pdf
    • http://www.gorillawalker.com/garments-of-paradise-wearable-discourse-in-the-digital-age.pdf
    • http://www.gorillawalker.com/postman-pat-in-muddle-and-other-stories-the-new-adventures.pdf
    • http://www.gorillawalker.com/harnessing-microstation-v8i.pdf
    • http://www.gorillawalker.com/a-madman-for-christ.pdf
    • http://www.gorillawalker.com/breastfeeding-and-human-lactation.pdf
    • http://www.gorillawalker.com/46th-publication-design-annual.pdf
    • http://www.gorillawalker.com/california-algebra-1-skills-practice-workbook.pdf
    • http://www.gorillawalker.com/bradshaw-s-hand-book-to-the-turkish-empire-volume-1.pdf
    • http://www.gorillawalker.com/steck-vaughn-timeline-graphic-novels-individual-student-edition-levels-7.pdf
    • http://www.gorillawalker.com/chinese-love-stories-from-ch-ing-shih.pdf
    • http://www.gorillawalker.com/peabody-s-mermaid.pdf
    • http://www.gorillawalker.com/searching-for-dragons-enchanted-forest-chronicles-book-2.pdf
    • http://www.gorillawalker.com/praise-of-folly-alma-evergreens.pdf
    • http://www.gorillawalker.com/the-hucow-doctor-hucow-medical-erotica.pdf
    • http://www.gorillawalker.com/the-common-core-companion-the-standards-decoded-grades-3-5.pdf
    • http://www.gorillawalker.com/bonanza-gold-great-klondike-gold-rush-no-5-mass-market.pdf
    • http://www.gorillawalker.com/armour-against-fate-british-military-intelligence-in-the-first-world.pdf
    • http://www.gorillawalker.com/geology-of-carbonate-reservoirs-the-identification-description-and-characterization-of.pdf
    • http://www.gorillawalker.com/the-easter-quiz-book-are-you-an-eggspert-holiday-quiz.pdf
    • http://www.gorillawalker.com/atlas-of-operative-procedures-in-surgical-oncology.pdf
    • http://www.gorillawalker.com/chester-s-way.pdf
    • http://www.gorillawalker.com/rapid-visual-screening-of-buildings-for-potential-seismic-hazards-a.pdf
    • http://www.gorillawalker.com/the-wet-grassland-guide-managing-floodplain-and-coastal-wet-grasslands.pdf
    • http://www.gorillawalker.com/basic-theories-of-traditional-chinese-medicine-chinese-edition.pdf
    • http://www.gorillawalker.com/ilts-social-science-political-science-117-teacher-certification-test-prep.pdf
    • http://www.gorillawalker.com/the-beggar-king-a-hangman-s-daughter-tale-unabridged-audible.pdf
    • http://www.gorillawalker.com/encyclopedia-of-american-spy-films.pdf
    • http://www.gorillawalker.com/basic-business-statistics-global-edition.pdf
    • http://www.gorillawalker.com/marxism-and-christianity.pdf
    • http://www.gorillawalker.com/the-mystery-of-the-sintra-road-dedalus-european-classics.pdf
    • http://www.gorillawalker.com/ida-b-wells-barnett-a-voice-against-violence-great-african.pdf
    • http://www.primopdf.com
    • http://www.gorillawalker.com/the-old-editor-says-maxims-for-writing-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#
    +1 more URL(s)

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