Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbdfdd5dd9774ad6…

MALICIOUS

PDF

43.0 KB Created: 2018-12-15 21:32:11 +03:00 Authoring application: pdfFactory Pro www.pdffactory.com (via pdfFactory Pro 4.05 (Windows 7 Home Basic x86 Russian))
MD5: 5cfa7f160a6a11e2d0b0aae4b7ce8487 SHA-1: 5506594ee24f215773d5cff2cc377e2e1fe0e832 SHA-256: fbdfdd5dd9774ad60a93e0db7eb1b159fa8f52a38ffd5cf1e674db33c4610b2b
90 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for containing a mass external PDF link farm, with 32 links pointing to a single domain. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the sheer volume of links suggests an attempt to manipulate search engine results or distribute malicious content through these external PDFs. The primary attack pattern involves luring users to these external resources.

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/echelon-somebody-s-listening.pdf
    • http://www.gorillawalker.com/ardaigh-cuain-harp-part-for-5924-harp-sheet-music.pdf
    • http://www.gorillawalker.com/diccionario-de-filosof-a-de-bolsillo-pocket-dictionary-of-philosophy.pdf
    • http://www.gorillawalker.com/the-sonnets-the-pelican-shakespeare.pdf
    • http://www.gorillawalker.com/the-sonnets-of-shakespeare.pdf
    • http://www.gorillawalker.com/the-abc-and-xyz-of-bee-culture.pdf
    • http://www.gorillawalker.com/boxing-naval-aviation-physical-training-manuals.pdf
    • http://www.gorillawalker.com/an-encyclopedia-of-the-violin-dover-books-on-music.pdf
    • http://www.gorillawalker.com/tokyo.pdf
    • http://www.gorillawalker.com/the-complete-guide-to-growing-healing-and-medicinal-herbs-a.pdf
    • http://www.gorillawalker.com/van-aaken-method.pdf
    • http://www.gorillawalker.com/brains-machines-and-mathematics.pdf
    • http://www.gorillawalker.com/girls-in-french-and-francophone-literature-and-film-french-literature.pdf
    • http://www.gorillawalker.com/survival-communications-in-indiana-north-region.pdf
    • http://www.gorillawalker.com/the-strained-alliance-peking-poyiongyang-moscow-and-the-politics-of.pdf
    • http://www.gorillawalker.com/an-empire-divided-religion-republicanism-and-the-making-of-french.pdf
    • http://www.gorillawalker.com/new-media-and-learning-in-the-21st-century-a-socio.pdf
    • http://www.gorillawalker.com/mouth-to-mouth.pdf
    • http://www.gorillawalker.com/early-music-history-volume-20-studies-in-medieval-and-early.pdf
    • http://www.gorillawalker.com/force-gr-5-8-kindle-edition.pdf
    • http://www.gorillawalker.com/captain-midnight-s-post-war-radio-years.pdf
    • http://www.gorillawalker.com/markens-gr-de-norwegian-edition.pdf
    • http://www.gorillawalker.com/the-manhattan-project-milestones-in-modern-world-history.pdf
    • http://www.gorillawalker.com/hard-to-break.pdf
    • http://www.gorillawalker.com/the-western-mail-order-bride-jed-maggie-from-london-and.pdf
    • http://www.gorillawalker.com/australia-handy-atlas.pdf
    • http://www.gorillawalker.com/easy-classical-saxophone-solos-for-alto-baritone-tenor-soprano-saxophone.pdf
    • http://www.gorillawalker.com/my-son-s-girlfriend-vol-1-bundle-naughty-younger-woman.pdf
    • http://www.gorillawalker.com/tunneling-earthworms-pull-ahead-books.pdf
    • http://www.gorillawalker.com/armageddon-strain.pdf
    • http://www.gorillawalker.com/computer-forensics-infosec-pro-guide.pdf
    • http://www.gorillawalker.com/the-cake-decorator-s-bible-a-complete-guide-to-cake.pdf
    • http://www.gorillawalker.com/lou-gehrig-s-disease-diseases-disorders.pdf
    • http://www.gorillawalker.com/the-rough-guide-to-sardinia-rough-guide-to-kindle-edition.pdf
    • http://www.gorillawalker.com/a-creative-approach-to-music-fundamentals-8th-edition-eighth-edition.pdf
    • http://www.gorillawalker.com/marvel-encyclopedia-volume-2-x-men-hc.pdf
    • http://www.gorillawalker.com/chopin-prelude-and-valse-from-les-sylphides-easy-piano-sheet.pdf
    • http://www.gorillawalker.com/dino-hunt-boxed-set-op.pdf
    • http://www.gorillawalker.com/you-wouldn-t-want-to-be-a-medieval-knight-armor.pdf
    • http://www.gorillawalker.com/daisy-the-owl-s-misadventures-with-interjections-kindle-edition.pdf
    • http://www.gori
    • 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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