Malicious PDF — malware analysis report

Static analysis result for SHA-256 03a428fbd4f69296…

MALICIOUS

PDF

42.3 KB Created: 2019-04-08 19:18:48 +03:00 Authoring application: calibre 0.9.13 [http://calibre-ebook.com]
MD5: 510151bbf5c1503be7d4a96564bcd539 SHA-1: fee6c15b449227150fa1bd268f5d0c78c762f364 SHA-256: 03a428fbd4f6929624c8833b24dc4317655b432d48d2bb5c1e01a0642c2d1452
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, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ML classifier also flagged the document as malicious. While no scripts were explicitly extracted, the structure suggests an attempt to manipulate search engine results or redirect users to potentially malicious content hosted on 'gorillawalker.com'. The presence of numerous links points towards a link farm or SEO abuse tactic.

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/a-puzzle-for-logan-level-3-audio-cassette-cambridge-english.pdf
    • http://www.gorillawalker.com/songwriting-in-nur-14-tagen-zum-songwriter-german-edition.pdf
    • http://www.gorillawalker.com/french-foreign-teacher-coordinator-handbook-in-english-and-french-french.pdf
    • http://www.gorillawalker.com/college-apologetics-proof-of-the-truth-of-the-catholic-faith.pdf
    • http://www.gorillawalker.com/chinese-for-english-speakers-1-pronunciation-and-words-kindle-edition.pdf
    • http://www.gorillawalker.com/touch-and-massage-in-early-child-development.pdf
    • http://www.gorillawalker.com/holt-algebra-1-student-edition-2007.pdf
    • http://www.gorillawalker.com/the-organized-family-historian-how-to-file-manage-and-protect.pdf
    • http://www.gorillawalker.com/ravaged-by-zeus-book-ii-of-the-nectar-of-olympus.pdf
    • http://www.gorillawalker.com/maurice-s-jubilee-oberon-modern-plays.pdf
    • http://www.gorillawalker.com/mastering-sauces-the-home-cook-s-guide-to-new-techniques.pdf
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    • http://www.gorillawalker.com/llandrindod-wells-and-elan-valley-rhayader-os-explorer-active-map.pdf
    • http://www.gorillawalker.com/case-history-correspondence-for-medical-secretaries.pdf
    • http://www.gorillawalker.com/physiology-of-the-gastrointestinal-tract-fifth-edition.pdf
    • http://www.gorillawalker.com/2006-status-of-the-nation-s-highways-bridges-and-transit.pdf
    • http://www.gorillawalker.com/basic-electronics-a-text-lab-manual-the-basic-electricity-electronics.pdf
    • http://www.gorillawalker.com/dk-readers-l2-star-wars-r2-d2-and-friends.pdf
    • http://www.gorillawalker.com/aloe-vera-nature-s-secret-things-you-never-knew-about.pdf
    • http://www.gorillawalker.com/por-una-vida-sin-gluten-la-enfermedad-celiaca-un-dilema.pdf
    • http://www.gorillawalker.com/ephemeral-media-transitory-screen-culture-from-television-to-youtube.pdf
    • http://www.gorillawalker.com/confederate-infantryman-1861-65-trade-editions.pdf
    • http://www.gorillawalker.com/der-gipfel-worauf-kannst-du-verzichten-german-edition-kindle-edition.pdf
    • http://www.gorillawalker.com/maximum-metabolism.pdf
    • http://www.gorillawalker.com/paranormal-activities-pumped-me-full-till-i-squirted-aggressive-paranormal.pdf
    • http://www.gorillawalker.com/driftmetal-ii-the-skyward-realm-kindle-edition.pdf
    • http://www.gorillawalker.com/h-gase-sus-propios-cosm-ticos-color-libro-pr-ctico.pdf
    • http://www.gorillawalker.com/pathfinder-module-murder-s-mark.pdf
    • http://www.gorillawalker.com/the-night-the-defeos-died.pdf
    • http://www.gorillawalker.com/business-communication-process-and-product.pdf
    • http://www.gorillawalker.com/qigong-for-arthritis-the-chinese-way-of-healing-and-prevention.pdf
    • http://www.gorillawalker.com/speaking-of-the-holy-the-art-of-communication-in-preaching.pdf
    • http://www.gorillawalker.com/do-you-remember-the-color-blue-the-questions-children-ask.pdf
    • http://www.gorillawalker.com/sock-monkey-kama-sutra-tantric-sex-positions-for-your-naughty.pdf
    • http://www.gorillawalker.com/baby-proofing-basics-2-ed-how-to-keep-your-child.pdf
    • http://www.gorillawalker.com/the-other-side-bordello-one-girl-two-billionaire-vampires.pdf
    • http://www.gorillawalker.com/pediatric-nuclear-medicine-and-molecular-imaging.pdf
    • http://www.gorillawalker.com/the-australian-health-care-system.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://calibre-ebook.com
    • 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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