Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa473b2bf72f326c…

MALICIOUS

PDF

42.5 KB Created: 2018-11-30 20:30:26 +03:00 Authoring application: PDFCreator Version 0.9.8 (via GPL Ghostscript 8.64)
MD5: 09d36cf03bac19c4f827abeb792eed50 SHA-1: facef65ad4ed420a4465ac7833d9094584e4d1c1 SHA-256: fa473b2bf72f326c2f365c96b8ab65b74741b793fc5531de1120e61e54521e7d
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious. The document body is heavily obfuscated and does not provide clear textual lures, but the sheer volume of links suggests a malicious intent, possibly for SEO spam or to distribute further malware. No scripts were extracted from this sample.

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/the-oath-dismas-hardy-series.pdf
    • http://www.gorillawalker.com/quimica-de-los-alimentos-spanish-edition.pdf
    • http://www.gorillawalker.com/and-it-don-t-stop-hip-hop-photography-by-mika.pdf
    • http://www.gorillawalker.com/archery-the-art-of-repetition-by-needham-simon-2006.pdf
    • http://www.gorillawalker.com/the-myth-of-medicine.pdf
    • http://www.gorillawalker.com/your-christian-mission-a-scriptographic-booklet.pdf
    • http://www.gorillawalker.com/going-solo-tenor-horn-faber-edition-going-solo.pdf
    • http://www.gorillawalker.com/pgp-gpg-email-for-the-practical-paranoid.pdf
    • http://www.gorillawalker.com/forgiving-as-we-ve-been-forgiven-community-practices-for-making.pdf
    • http://www.gorillawalker.com/jane-and-austen-kindle-edition.pdf
    • http://www.gorillawalker.com/king-lear-no-fear-shakespeare.pdf
    • http://www.gorillawalker.com/buds-and-blossoms-a-book-about-flowers-growing-things.pdf
    • http://www.gorillawalker.com/focus-on-dyslexia-research.pdf
    • http://www.gorillawalker.com/intermediate-algebra-graphs-and-functions-text-only-3rd-edition.pdf
    • http://www.gorillawalker.com/tintin-the-art-of-herg.pdf
    • http://www.gorillawalker.com/a-pastoral-christmas-handbell-sheet-music-handbell-3-5-octaves.pdf
    • http://www.gorillawalker.com/apollo-experience-report-ascent-propulsion-system-nasa-technical-note.pdf
    • http://www.gorillawalker.com/sightseeing.pdf
    • http://www.gorillawalker.com/the-late-medieval-pope-prophecies-the-genus-nequam-group-medieval.pdf
    • http://www.gorillawalker.com/marketing-research-an-applied-orientation-6th-edition.pdf
    • http://www.gorillawalker.com/breakthrough-the-true-story-of-penicillin.pdf
    • http://www.gorillawalker.com/egonomics-what-makes-ego-our-greatest-asset-or-most-expensive.pdf
    • http://www.gorillawalker.com/les-enfants-du-capitaine-grant-illustr.pdf
    • http://www.gorillawalker.com/guidelines-for-developing-instructions.pdf
    • http://www.gorillawalker.com/the-year-my-whole-country-turned-jewish-a-time-travel.pdf
    • http://www.gorillawalker.com/lamentation-of-thieves-sword-sorcery-d20.pdf
    • http://www.gorillawalker.com/nelson-handwriting-interactive-whiteboard-cd-rom-blue-level.pdf
    • http://www.gorillawalker.com/zoning-the-oceans-the-next-big-step-in-coastal-zone.pdf
    • http://www.gorillawalker.com/showdown-in-mudbug-ghost-in-law-mystery-romance-book-3.pdf
    • http://www.gorillawalker.com/the-history-of-emily-montague.pdf
    • http://www.gorillawalker.com/listening-to-the-mukies-and-their-character-building-adventures.pdf
    • http://www.gorillawalker.com/my-revolution-rapid-rabbit-guitar-song-book-japanese-edition-kindle.pdf
    • http://www.gorillawalker.com/historical-register-and-dictionary-of-the-united-states-army-from.pdf
    • http://www.gorillawalker.com/practical-distillation-control.pdf
    • http://www.gorillawalker.com/leonard-cohen-anthology-songbook.pdf
    • http://www.gorillawalker.com/managing-a-hedge-fund-a-complete-guide-to-trading-business.pdf
    • http://www.gorillawalker.com/the-federalist-anti-federalist-debate-over-states-rights-a-primary.pdf
    • http://www.gorillawalker.com/garrett-s-camoes-an-article-from-portuguese-studies-html-digital.pdf
    • http://www.gorillawalker.com/civil-society-and-the-aid-industry.pdf
    • http://www.gorillawalker.com/patterns-in-polymer-imprint-and-accent-bead-techniques.pdf
    • http://www.gorillawalker.com/going
    • 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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