Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8f9e5fb2b8d5d87…

MALICIOUS

PDF

43.2 KB Created: 2018-11-26 20:26:59 +03:00 Authoring application: Acrobat PDFMaker 6.0 for Word (via Acrobat Distiller 6.0 (Windows))
MD5: 40174c5a9a7f3f80b418e089c32bd86e SHA-1: b5d790c18730729aabe07cd85130196ee68d83a1 SHA-256: c8f9e5fb2b8d5d87a692a13dfbe9689b0c1cfc75dd82a7e9ea634132395f0d40
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF was flagged by a machine learning classifier and a critical heuristic for containing a large number of external links, suggesting a link farm or SEO abuse. The document body is heavily obfuscated, but the embedded URLs point to a large collection of PDF files on the domain 'gorillawalker.com'. This indicates a likely attempt to drive traffic to these external resources, potentially for SEO manipulation or to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8452

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/all-about-colour.pdf
    • http://www.gorillawalker.com/borderlands-of-eternity-embracing-across-china-on-foot.pdf
    • http://www.gorillawalker.com/nelson-international-mathematics-2nd-edition-workbook-3.pdf
    • http://www.gorillawalker.com/5-proven-methods-for-making-1-000-per-month-with.pdf
    • http://www.gorillawalker.com/yankee-boys-of-war.pdf
    • http://www.gorillawalker.com/essentials-for-strings-a-systematic-approach-technical-development-viola-by.pdf
    • http://www.gorillawalker.com/advances-in-electrochemistry-and-electrochemical-engineering-volume-6.pdf
    • http://www.gorillawalker.com/censorship-and-nineteen-eighty-four.pdf
    • http://www.gorillawalker.com/in-pursuit-of-wisdom-the-scope-of-philosophy.pdf
    • http://www.gorillawalker.com/tal-dia-como-hoy-on-a-day-like-this-narrativa.pdf
    • http://www.gorillawalker.com/a-history-of-the-colony-of-sierra-leone-western-africa.pdf
    • http://www.gorillawalker.com/building-god-s-kingdom-inside-the-world-of-christian-reconstruction.pdf
    • http://www.gorillawalker.com/merrick.pdf
    • http://www.gorillawalker.com/diet-for-a-hot-planet-the-climate-crisis-at-the.pdf
    • http://www.gorillawalker.com/visual-music-instrument-patents-volume-one.pdf
    • http://www.gorillawalker.com/traveling-green-going-green.pdf
    • http://www.gorillawalker.com/jowett-1901-1954-images-of-motoring.pdf
    • http://www.gorillawalker.com/electrical-and-magnetic-methods-of-non-destructive-testing-non-destructive.pdf
    • http://www.gorillawalker.com/medieval-alphabets-and-decorative-devices-dover-pictorial-archive.pdf
    • http://www.gorillawalker.com/david-busch-s-canon-eos-rebel-t3-1100d-guide-to.pdf
    • http://www.gorillawalker.com/contemporary-theories-of-learning-learning-theorists-in-their-own-words.pdf
    • http://www.gorillawalker.com/cinderella-the-wicked-truth-kindle-edition.pdf
    • http://www.gorillawalker.com/chase-s-calendar-of-events-2001-with-cd-rom.pdf
    • http://www.gorillawalker.com/roman-patterns.pdf
    • http://www.gorillawalker.com/transport-phenomena-for-chemical-reactor-design-1st-edition-by-belfiore.pdf
    • http://www.gorillawalker.com/a-time-to-jump.pdf
    • http://www.gorillawalker.com/tai-chi-stress-relief-your-ultimate-summary-guide-yang-style.pdf
    • http://www.gorillawalker.com/from-the-greek-mimes-to-marcel-marceau-and-beyond-mimes.pdf
    • http://www.gorillawalker.com/believe-in-miracles-south-africa-from-malan-to-mandela-and.pdf
    • http://www.gorillawalker.com/inferno-perdition-s-gate-omnibus-edition.pdf
    • http://www.gorillawalker.com/philosopher-kings.pdf
    • http://www.gorillawalker.com/streetwise-brooklyn-map-laminated-city-center-street-map-of-brooklyn.pdf
    • http://www.gorillawalker.com/piers-plowman-the-a-text-an-alliterative-verse-translation-pegasus.pdf
    • http://www.gorillawalker.com/introduction-to-sociology-ninth-edition.pdf
    • http://www.gorillawalker.com/banana-wars-inner-history-of-american-empire-1900-34.pdf
    • http://www.gorillawalker.com/the-brand-glossary.pdf
    • http://www.gorillawalker.com/favorite-classic-melodies-5-book-set-bastien-piano-library-primer.pdf
    • http://www.gorillawalker.com/the-russo-japanese-war-at-sea-volume-2-the-battle.pdf
    • http://www.gorillawalker.com/octopuses-and-squids-undersea-encounters.pdf
    • http://www.gorillawalker.com/the-island-of-worthy-boys-a-novel.pdf
    • http://www.gorillawalker.com
    • 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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