Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cf87851fee94100…

MALICIOUS

PDF

43.6 KB Created: 2018-11-30 20:05:18 +03:00 Authoring application: PDFCreator Version 0.8.0 (via AFPL Ghostscript 8.14)
MD5: 4adc8895c353232d38c2712cd85cc433 SHA-1: fc8c97dfdc8955c925d0072f9638eb2e2dc0acd6 SHA-256: 5cf87851fee9410071f538dc3272573c43241fb07bd5c59b66deff55f99e5eea
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, primarily hosted on www.gorillawalker.com. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute potentially malicious content. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8683

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/accounting-study-aids-for-gcse.pdf
    • http://www.gorillawalker.com/wang-kuo-wei-s-jen-chien-tz-u-hua-a.pdf
    • http://www.gorillawalker.com/inside-the-machine-an-illustrated-introduction-to-microprocessors-and-computer.pdf
    • http://www.gorillawalker.com/rock-climbing-in-scotland.pdf
    • http://www.gorillawalker.com/casenote-legal-briefs-administrative-law-keyed-to-cass-diver-beerman.pdf
    • http://www.gorillawalker.com/world-war-ii-infantry-anti-tank-tactics-elite.pdf
    • http://www.gorillawalker.com/spies-of-the-first-world-war-under-cover-for-king.pdf
    • http://www.gorillawalker.com/the-earthwalkers.pdf
    • http://www.gorillawalker.com/controversy-and-coalition-the-new-feminist-movement-across-four-decades.pdf
    • http://www.gorillawalker.com/patrones-de-pase-en-f.pdf
    • http://www.gorillawalker.com/boys-know-it-all-wise-thoughts-and-wacky-ideas-from.pdf
    • http://www.gorillawalker.com/hopscotch-blow-up-we-love-glenda-so-much-everyman-s.pdf
    • http://www.gorillawalker.com/rwanda-and-burundi-sudoc-prex-3-10-4-r-94.pdf
    • http://www.gorillawalker.com/hounding-the-hound-of-the-baskervilles-a-poetic-portrait-of.pdf
    • http://www.gorillawalker.com/the-owls-don-t-give-a-hoot-buck-wilder-s.pdf
    • http://www.gorillawalker.com/a-symphony-of-echoes-the-chronicles-of-st-mary-book.pdf
    • http://www.gorillawalker.com/vikings-the-north-atlantic-saga.pdf
    • http://www.gorillawalker.com/schaum-s-outline-of-probability-and-statistics-3-e-schaum.pdf
    • http://www.gorillawalker.com/annual-reports-in-organic-synthesis-1991.pdf
    • http://www.gorillawalker.com/the-lancashire-witches-a-chronicle-of-sorcery-and-death-on.pdf
    • http://www.gorillawalker.com/olympic-marathon-a-centennial-history-of-the-games-most-storied.pdf
    • http://www.gorillawalker.com/a-treasury-of-mermaids-mermaid-tales-from-around-the-world.pdf
    • http://www.gorillawalker.com/power-tennis-training.pdf
    • http://www.gorillawalker.com/a-social-history-of-the-fool-kindle-edition.pdf
    • http://www.gorillawalker.com/neurotransmission-and-cerebrovascular-v2-function-international-congress-series-excerpta-medica.pdf
    • http://www.gorillawalker.com/fodor-s-vienna-the-best-of-austria-with-salzburg-skiing.pdf
    • http://www.gorillawalker.com/the-new-york-book-of-music.pdf
    • http://www.gorillawalker.com/cottonmouths-blastoff-readers-snakes-alive-blastoff-readers-level-3.pdf
    • http://www.gorillawalker.com/londonderry-air-arr-john-iveson-just-brass-lollipops-no-4.pdf
    • http://www.gorillawalker.com/the-fashionable-ear-a-history-of-ear-piercing-trends-for.pdf
    • http://www.gorillawalker.com/mindcontrolmarketing-com-how-everyday-people-are-using-forbidden-mind-control.pdf
    • http://www.gorillawalker.com/microwave-cooking-coca-cola-chicken-wings-microwave-cooking-poultry-book.pdf
    • http://www.gorillawalker.com/last-of-the-free-a-history-of-the-highlands-and.pdf
    • http://www.gorillawalker.com/geoff-duke-in-pursuit-of-perfection.pdf
    • http://www.gorillawalker.com/eleazar-y-el-rio-spanish-edition.pdf
    • http://www.gorillawalker.com/8-minutos-por-la-manana-para-reducir-caderas-y-muslos.pdf
    • http://www.gorillawalker.com/dot-the-little-lady-bug.pdf
    • http://www.gorillawalker.com/boff-bundle.pdf
    • http://www.gorillawalker.com/magnetic-resonance-procedures-health-effects-and-safety.pdf
    • http://www.gorillawalker.com/manifestaci.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/