Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b21c9620f509224…

MALICIOUS

PDF

41.5 KB Created: 2018-11-14 08:19:09 +03:00 Authoring application: Acrobat PDFMaker 6.0 for Word (via Acrobat Distiller 6.0 (Windows))
MD5: 889ef3ca4f7d148510cd34c191b8feef SHA-1: 03bd88df8cf05cfac39ea6fb3ea89953bfa6f981 SHA-256: 5b21c9620f509224e47b20759383e7ed8d0db0b1a08fcb00412654da1e42dd22
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a large number of external PDF links, suggesting a link farm or a method to distribute malicious content. The ML classifier also flagged the PDF as malicious. The document body is heavily obfuscated and does not provide clear textual content, but the embedded URLs point to a domain that appears to be used for hosting numerous PDF files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9181

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/john-owen-the-man-and-his-theology.pdf
    • http://www.gorillawalker.com/the-paper-airplane-book-the-official-book-of-the-second.pdf
    • http://www.gorillawalker.com/molecular-theory-of-water-and-aqueous-solutions-br-part-ii.pdf
    • http://www.gorillawalker.com/the-first-great-civilizations-life-in-mesopotamia-the-indus-valley.pdf
    • http://www.gorillawalker.com/1997-1998-national-directory-of-legal-employers.pdf
    • http://www.gorillawalker.com/golf-my-way.pdf
    • http://www.gorillawalker.com/the-merck-manual-home-health-handbook-3rd-third-edition-bymerck.pdf
    • http://www.gorillawalker.com/el-cuento-de-un-hombre-ciego-libros-del-tiempo-books.pdf
    • http://www.gorillawalker.com/alkaline-recipes-the-ultimate-guide.pdf
    • http://www.gorillawalker.com/the-rough-guide-to-first-time-africa-1-rough-guide.pdf
    • http://www.gorillawalker.com/flying-turtleback-school-library-binding-edition.pdf
    • http://www.gorillawalker.com/bolivia-an-undiscovered-land.pdf
    • http://www.gorillawalker.com/new-museums-and-the-making-of-culture.pdf
    • http://www.gorillawalker.com/datapedia-of-the-united-states-american-history-in-numbers-datapedia.pdf
    • http://www.gorillawalker.com/atlanta-beer-a-heady-history-of-brewing-in-the-hub.pdf
    • http://www.gorillawalker.com/prejudice.pdf
    • http://www.gorillawalker.com/die-kunst-der-t-uschung-thriller-german-edition.pdf
    • http://www.gorillawalker.com/blue-impression-uk-version-fantasy-art-fractale-digital-art-calvendo.pdf
    • http://www.gorillawalker.com/flute-solos-from-the-bach-cantatas-passions-and-oratorios-flute.pdf
    • http://www.gorillawalker.com/come-away-my-beloved-gift-edition-the-intimate-devotional-classic.pdf
    • http://www.gorillawalker.com/libyan-sugar.pdf
    • http://www.gorillawalker.com/the-creeping-garden-irrational-encounters-with-plasmodial-slime-moulds.pdf
    • http://www.gorillawalker.com/the-shakespearean-stage-1574-1642.pdf
    • http://www.gorillawalker.com/rotating-fields-in-general-relativity.pdf
    • http://www.gorillawalker.com/the-cuckold-s-hotwife-diaries-the-complete-3-book-series.pdf
    • http://www.gorillawalker.com/poughkeepsie-the-poughkeepsie-brotherhood-series.pdf
    • http://www.gorillawalker.com/aromatherapy-solutions-essential-oils-to-lift-the-mind-body-and.pdf
    • http://www.gorillawalker.com/peace-50-years-of-protest.pdf
    • http://www.gorillawalker.com/the-mistake-black-cat-vol-2-a-salem-massachusetts-mini.pdf
    • http://www.gorillawalker.com/the-sagebrush-trail-western-movies-and-twentieth-century-america-the.pdf
    • http://www.gorillawalker.com/annabelle-of-anchony-burdens-of-the-mind.pdf
    • http://www.gorillawalker.com/obstetric-imaging-expert-radiology-series-1e.pdf
    • http://www.gorillawalker.com/girls-and-young-women-leading-the-way-20-true-stories.pdf
    • http://www.gorillawalker.com/math-in-focus-singapore-math-teacher-s-edition-course-1.pdf
    • http://www.gorillawalker.com/stealing-dreams-a-fertility-clinic-scandal.pdf
    • http://www.gorillawalker.com/the-reluctant-witness-love-inspired-lp-suspense.pdf
    • http://www.gorillawalker.com/transylvania-bradt-travel-guide.pdf
    • http://www.gorillawalker.com/the-diseases-of-the-pancreas-and-their-homoeopathic-treatment.pdf
    • http://www.gorillawalker.com/frans-post-catalogue-raisonn.pdf
    • http://www.gorillawalker.com/forced-normalization-and-alternative-psychoses-of-epilepsy.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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