Malicious PDF — malware analysis report

Static analysis result for SHA-256 be27d12b8b48a0ea…

MALICIOUS

PDF

44.6 KB Created: 2019-04-11 13:06:18 +03:00 Authoring application: PScript5.dll Version 5.2 (via GPL Ghostscript 8.15)
MD5: e070b3355df5b741af187b9b82f0a7c2 SHA-1: 0a27150fb6ed57663332318bf7094306196d1d99 SHA-256: be27d12b8b48a0ea2a04be167d10ac803d48715dc9c3c61a8c12569a77e52ad9
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Phishing:Spearphishing Attachment T1204.002 Malicious File:Malicious Link

The PDF was flagged by a machine learning classifier and a critical heuristic for containing a large number of external links, specifically to PDF files hosted on www.gorillawalker.com. This suggests a link farm or SEO poisoning technique, likely intended to either drive traffic to malicious sites or to distribute further malware disguised as legitimate documents. 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 0.9007

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/stranded-with-him.pdf
    • http://www.gorillawalker.com/minecraft-complete-unofficial-simple-beginners-guide-tips-crafting-recipes-shelter.pdf
    • http://www.gorillawalker.com/reading-comprehension-grade-1-home-workbooks.pdf
    • http://www.gorillawalker.com/linda-mccartney-s-home-vegetarian-cooking-308-quick-easy-and.pdf
    • http://www.gorillawalker.com/the-law-of-one-book-5-personal-material.pdf
    • http://www.gorillawalker.com/dale-brown-s-handbook-of-basketball-fundamentals-and-drills-kindle.pdf
    • http://www.gorillawalker.com/sociologism-and-existentialism.pdf
    • http://www.gorillawalker.com/dolphin-readers-starter-level-175-word-vocabulary-moving-house-activity.pdf
    • http://www.gorillawalker.com/the-tiger-s-fang.pdf
    • http://www.gorillawalker.com/shar-pei-calendar-multilingual-edition.pdf
    • http://www.gorillawalker.com/carmarthen-bay-gower-wales-coast-path-official-guide-tenby-to.pdf
    • http://www.gorillawalker.com/the-family-reference-history-of-art.pdf
    • http://www.gorillawalker.com/the-niagara-grab-a-plea-for-consumers-of-hydroelectric-energy.pdf
    • http://www.gorillawalker.com/how-to-carve-wildfowl-book-2.pdf
    • http://www.gorillawalker.com/california-lawsuit-blames-microsoft-for-wormholes-an-article-from-liability.pdf
    • http://www.gorillawalker.com/geochemistry-in-mineral-exploration.pdf
    • http://www.gorillawalker.com/the-alchemist-a-graphic-novel.pdf
    • http://www.gorillawalker.com/concrete-in-coastal-structures.pdf
    • http://www.gorillawalker.com/do-not-resuscitate-decision-making-ohio-s-do-not-resuscitate.pdf
    • http://www.gorillawalker.com/finite-element-analysis-theory-and-application-with-ansys-3rd-edition.pdf
    • http://www.gorillawalker.com/lessons-from-a-southern-mother-chinese-edition.pdf
    • http://www.gorillawalker.com/introduction-to-management-science-11th-edition.pdf
    • http://www.gorillawalker.com/nightside-of-eden.pdf
    • http://www.gorillawalker.com/black-barbie-thrill-o-gy-all-3-books-in-one.pdf
    • http://www.gorillawalker.com/saga-hafnar-i-hornafir-i-icelandic-edition.pdf
    • http://www.gorillawalker.com/secret-ceremonies.pdf
    • http://www.gorillawalker.com/autobiography-of-black-jazz.pdf
    • http://www.gorillawalker.com/fundamentals-of-human-hair-science-cosmetic-science-monographs-no-1.pdf
    • http://www.gorillawalker.com/she-sells-seashells-a-tongue-twister-story-hello-reader-level.pdf
    • http://www.gorillawalker.com/the-adventures-of-tom-sawyer-collector-s-library-of-famous.pdf
    • http://www.gorillawalker.com/shifted-a-miakoda-young-novel-volume-3.pdf
    • http://www.gorillawalker.com/pretending-to-be-normal-living-with-asperger-s-syndrome-autism.pdf
    • http://www.gorillawalker.com/ride-away-on-your-horses-music-now-i-m-one.pdf
    • http://www.gorillawalker.com/once-upon-a-boyfriend-a-gay-young-adult-romance-story.pdf
    • http://www.gorillawalker.com/the-standard-for-program-management.pdf
    • http://www.gorillawalker.com/american-cheeses-the-best-regional-artisan-and-farmhouse-cheeses-who.pdf
    • http://www.gorillawalker.com/health-stories-high-beginning-student-book-reading-and-language-activities.pdf
    • http://www.gorillawalker.com/holy-days-vs-christianized-pagan-celebrations.pdf
    • http://www.gorillawalker.com/re-print-mediterranean-moods-footnotes-of-travel-in-the-islands.pdf
    • http://www.gorillawalker.com/heart-in-the-right-place-a-memoir.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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