Malicious PDF — malware analysis report

Static analysis result for SHA-256 a85376d3917181eb…

MALICIOUS

PDF

35.1 KB Created: 2019-05-24 00:41:55 +03:00 Authoring application: LaTeX with hyperref and pdfscreen (via Mac OS X 10.5.7 Quartz PDFContext)
MD5: bb26a272a617d0aff1337508cdc673b0 SHA-1: 009b0316089169fecf72c3dce2376c664fdf1bba SHA-256: a85376d3917181ebf15215066ae058a15fc8ad2f07647d841ca4853b98bc5750
90 Risk Score

Malware Insights

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

The PDF heuristic `PDF_SEO_LINK_FARM` indicates a mass of external links, suggesting a link farm or SEO manipulation tactic. The ML classifier also flagged the PDF as malicious. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure. The primary IOCs are the numerous external URLs pointing to PDF files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8018

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-birth-of-intersubjectivity-psychodynamics-neurobiology-and-the-self-the.pdf
    • http://www.gorillawalker.com/vitamin-mineral-kitchen-chart.pdf
    • http://www.gorillawalker.com/manual-of-maternal-newborn-nursing.pdf
    • http://www.gorillawalker.com/ptsd-brain-mechanisms-and-clinical-implications.pdf
    • http://www.gorillawalker.com/spinning-at-the-boundary-the-making-of-an-air-traffic.pdf
    • http://www.gorillawalker.com/the-unprofessionals-new-american-writing-from-the-paris-review.pdf
    • http://www.gorillawalker.com/logo-design-graphic-imagination-paperback.pdf
    • http://www.gorillawalker.com/soe-secret-operations-manual.pdf
    • http://www.gorillawalker.com/critical-perspectives-on-the-responsibility-to-protect-interrogating-theory-and.pdf
    • http://www.gorillawalker.com/what-we-wore-a-people-s-history-of-british-style.pdf
    • http://www.gorillawalker.com/pakistan-construction-plans-for-proposed-26-000-000-vehicle-manufacturing.pdf
    • http://www.gorillawalker.com/the-economics-of-national-forest-management-routledge-revivals.pdf
    • http://www.gorillawalker.com/beautiful-creatures-the-art-of-james-ryman-v-1.pdf
    • http://www.gorillawalker.com/ordinary-differential-equations-qualitative-theory-graduate-studies-in-mathematics.pdf
    • http://www.gorillawalker.com/fashion-truth-or-dare.pdf
    • http://www.gorillawalker.com/chusei-no-kajin-toshinari-yori-yusai-made-japanese-edition.pdf
    • http://www.gorillawalker.com/linear-algebra-a-concrete-approach.pdf
    • http://www.gorillawalker.com/truck-can-be-as-big-as-a-house-i-didn.pdf
    • http://www.gorillawalker.com/best-easy-day-hiking-guide-and-trail-map-bundle-olympic.pdf
    • http://www.gorillawalker.com/michelin-green-guide-tuscany-1st-edition.pdf
    • http://www.gorillawalker.com/before-the-invention-of-paradise-arc-visible-poets.pdf
    • http://www.gorillawalker.com/the-new-york-times-guide-to-new-york-city-2001.pdf
    • http://www.gorillawalker.com/the-wish-book.pdf
    • http://www.gorillawalker.com/footprints-in-time.pdf
    • http://www.gorillawalker.com/chi-kung.pdf
    • http://www.gorillawalker.com/cultivating-minds-identity-as-meaning-making-practice.pdf
    • http://www.gorillawalker.com/theology-in-service-to-the-church-global-and-ecumenical-perspectives.pdf
    • http://www.gorillawalker.com/mason-jar-suppers-the-50-best-mason-jar-dinner-recipes.pdf
    • http://www.gorillawalker.com/klassische-duette-f-r-melodica-und-gitarre-melodica-f-r.pdf
    • http://www.gorillawalker.com/church-musician.pdf
    • http://www.gorillawalker.com/crime-uncovered-anti-hero-intellect-books-crime-uncovered.pdf
    • http://www.gorillawalker.com/finite-element-model-updating-using-computational-intelligence-techniques-applications-to.pdf
    • http://www.gorillawalker.com/nsta-pathways-to-the-science-standard-guidelines-for-moving-the.pdf
    • http://www.gorillawalker.com/legend-of-ender-colossus-part-1-unofficial-minecraft-book-endventures.pdf
    • http://www.gorillawalker.com/crowdsourcing-the-mit-press-essential-knowledge-series.pdf
    • http://www.gorillawalker.com/folded-map-lexington-bluegrass-area-rand-mcnally.pdf
    • http://www.gorillawalker.com/jason-and-the-golden-fleece-the-most-adventurous-and-exciting.pdf
    • http://www.gorillawalker.com/secrets-of-a-millionaire-landlord.pdf
    • http://www.gorillawalker.com/cultural-property-security-protecting-museums-historic-sites-archives-and-libraries.pdf
    • http://www.gorillawalker.com/tai-chi-chuan-its-effects-and-practical-applications.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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