Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d3753875c59a706…

MALICIOUS

PDF

30.5 KB Created: 2020-02-21 02:26:09 +03:00 Authoring application: - (via Acrobat Distiller 5.0.5 (Windows))
MD5: fe8db5cf57f6adbe6a90288f570bfcd6 SHA-1: 92d52f1a0ce79317dad050496af6773472477ddd SHA-256: 5d3753875c59a70692bc1a8c4829dcb055fd23e90aa7d087254d5d42ce22f018
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ML classifier also flagged the document as malicious. While no scripts were extracted, the sheer volume of links suggests an attempt to manipulate search engine results or to serve as a distribution point for other malicious content, aligning with a spearphishing attachment tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8405

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/an-invitation-to-love.pdf
    • http://www.gorillawalker.com/sleep-disorders-sleep-education-followed-by-proper-application-can-help.pdf
    • http://www.gorillawalker.com/my-date-comics-3-golden-age-romance-humor.pdf
    • http://www.gorillawalker.com/essentials-of-oceanography-10th-tenth-edition-text-only.pdf
    • http://www.gorillawalker.com/human-communication-disorders-an-introduction-8th-edition-allyn-bacon-communication.pdf
    • http://www.gorillawalker.com/the-love-ballads-persian-love-poems-persian-edition.pdf
    • http://www.gorillawalker.com/continuous-quality-improvement-in-healthcare.pdf
    • http://www.gorillawalker.com/kids-travel-journal-my-trip-to-tuscany.pdf
    • http://www.gorillawalker.com/the-world-guide-11th-edition-global-reference-country-by-country.pdf
    • http://www.gorillawalker.com/filmcraft-cinematography-of-mike-goodridge-tim-grierson-on-16-january.pdf
    • http://www.gorillawalker.com/diagnostic-ultrasound-imaging-and-blood-flow-measurements-digital.pdf
    • http://www.gorillawalker.com/babysitter-fantasy-book-2.pdf
    • http://www.gorillawalker.com/cleveland-on-foot-4th-edition-50-walks-and-hikes-in.pdf
    • http://www.gorillawalker.com/anglo-american-cataloging-rules-2nd-edition-handbook-korean-edition.pdf
    • http://www.gorillawalker.com/macromolecules-containing-metal-and-metal-like-elements-a-half-century.pdf
    • http://www.gorillawalker.com/a-companion-to-astrology-in-the-renaissance-brill-s-companions.pdf
    • http://www.gorillawalker.com/favorite-quotations-from-the-collection-of-thomas-s-monson.pdf
    • http://www.gorillawalker.com/barclay-butera-s-getaways-and-retreats.pdf
    • http://www.gorillawalker.com/a-certain-kind-of-light.pdf
    • http://www.gorillawalker.com/caudillos-in-spanish-america-1800-1850.pdf
    • http://www.gorillawalker.com/mexican-cinema-reflections-of-a-society-1896-to-2004.pdf
    • http://www.gorillawalker.com/dorland-s-medical-equipment-word-book-for-medical-transcriptionists-1e.pdf
    • http://www.gorillawalker.com/venice-great-cities-through-the-ages.pdf
    • http://www.gorillawalker.com/graphics-gems.pdf
    • http://www.gorillawalker.com/jesus-career-counselor-how-to-find-and-keep-your-perfect.pdf
    • http://www.gorillawalker.com/a-help-to-domestic-happiness.pdf
    • http://www.gorillawalker.com/simply-sewing-kids-can-do-it.pdf
    • http://www.gorillawalker.com/holt-biology-interactive-reader-answer-key.pdf
    • http://www.gorillawalker.com/e-e-cummings-a-brief-critique-kindle-edition.pdf
    • http://www.gorillawalker.com/log-cabin-classics.pdf
    • http://www.gorillawalker.com/ten-universal-principles-a-brief-philosophy-of-the-life-issues.pdf
    • http://www.gorillawalker.com/honus-wagner-and-his-pittsburgh-pirates-scenes-from-a-golden.pdf
    • http://www.gorillawalker.com/helen-keller-lives-and-times.pdf
    • http://www.gorillawalker.com/using-theory-to-explore-health-medicine-and-society.pdf
    • http://www.gorillawalker.com/electrochemistry-of-fuel-cell-electrodes-surface-oxidation-of-gold-electrodes.pdf
    • http://www.gorillawalker.com/exegetical-texts-companion-to-the-qumran-scrolls.pdf
    • http://www.gorillawalker.com/an-atlas-of-the-sheep-brain-for-gross-neuroanatomy.pdf
    • http://www.gorillawalker.com/4wd-survival-guide.pdf
    • http://www.gorillawalker.com/from-the-press-box-70-years-of-great-moments-in.pdf
    • http://www.gorillawalker.com/slut-wife.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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