Malicious PDF — malware analysis report

Static analysis result for SHA-256 3203089c56838f71…

MALICIOUS

PDF

44.3 KB Created: 2018-11-23 08:00:32 +03:00 Authoring application: calibre 0.9.13 [http://calibre-ebook.com]
MD5: ea6586286fd16ddb370a862bdaf92a02 SHA-1: 24003e631878300be602ea7f1e11f8faf939aeea SHA-256: 3203089c56838f715a4b25b8d54b7fac5c626cbcd3e7d8f1ec338e279c1867ee
90 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains a large number of embedded links to external PDF files hosted on gorillawalker.com. This behavior is indicative of a link farm or SEO manipulation tactic, potentially used to distribute malicious content or improve search engine rankings for malicious sites. No scripts were extracted from this sample, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8439

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/intikhab-e-majaz-selected-poems-of-majaz.pdf
    • http://www.gorillawalker.com/strangers-in-the-abandoned-house-trouble-with-strangers-2.pdf
    • http://www.gorillawalker.com/oral-pathology-outline.pdf
    • http://www.gorillawalker.com/a-guide-to-the-whitewater-rivers-of-washington-a-comprehensive.pdf
    • http://www.gorillawalker.com/the-anthropological-turn-the-human-orientation-of-karl-rahner-moral.pdf
    • http://www.gorillawalker.com/succesvol-publiceren-op-amazon-handboek-dutch-edition.pdf
    • http://www.gorillawalker.com/the-science-of-monsters-the-origins-of-the-creatures-we.pdf
    • http://www.gorillawalker.com/jury-the-people-vs-juan-corona.pdf
    • http://www.gorillawalker.com/gastornis-prehistoric-beasts.pdf
    • http://www.gorillawalker.com/the-cockroach-v-2-rentokil-library.pdf
    • http://www.gorillawalker.com/theory-of-groups.pdf
    • http://www.gorillawalker.com/sensory-biology-of-sharks-skates-rays.pdf
    • http://www.gorillawalker.com/future-anterior-2-2.pdf
    • http://www.gorillawalker.com/attendance-registration-pad-holder-teal-pkg-of-6.pdf
    • http://www.gorillawalker.com/eat-like-an-italian-recipes-for-the-good-life.pdf
    • http://www.gorillawalker.com/astronomical-algorithms.pdf
    • http://www.gorillawalker.com/acsm-s-exercise-management-for-persons-with-chronic-diseases-and.pdf
    • http://www.gorillawalker.com/las-dimensiones-en-arquitectura-architectural-graphic-standards.pdf
    • http://www.gorillawalker.com/performance-flying-hang-gliding-techniques-for-intermediate-and-advanced-pilots.pdf
    • http://www.gorillawalker.com/whole-earth-thinking-and-planetary-coexistence-ecological-wisdom-at-the.pdf
    • http://www.gorillawalker.com/but-first.pdf
    • http://www.gorillawalker.com/adventures-in-arduino.pdf
    • http://www.gorillawalker.com/partial-differential-equations-classification-properties-and-applications.pdf
    • http://www.gorillawalker.com/keyboard-anthology-first-series-book-ii-keyboard-anthologies-abrsm-bk.pdf
    • http://www.gorillawalker.com/the-splendor-of-the-word-medieval-and-renaissance-illuminated-manuscripts.pdf
    • http://www.gorillawalker.com/the-catalogues-of-the-manuscript-collections-in-the-british-museum.pdf
    • http://www.gorillawalker.com/women-who-don-t-wait-in-line-break-the-mold.pdf
    • http://www.gorillawalker.com/rep-blica-oriental-del-uruguay-la-cuesti-n-electoral-de.pdf
    • http://www.gorillawalker.com/leonard-maltin-s-movie-and-video-guide-2001-leonard-maltin.pdf
    • http://www.gorillawalker.com/why-not-lafayette.pdf
    • http://www.gorillawalker.com/the-baker-s-wife-vocal-selections-piano-vocal.pdf
    • http://www.gorillawalker.com/unti-holley.pdf
    • http://www.gorillawalker.com/wall-street-people-true-stories-of-the-great-barons-of.pdf
    • http://www.gorillawalker.com/allergies-at-your-fingertips-at-your-fingertips.pdf
    • http://www.gorillawalker.com/analyzing-strategic-nuclear-policy-princeton-legacy-library.pdf
    • http://www.gorillawalker.com/13-planets-the-latest-view-of-the-solar-system-national.pdf
    • http://www.gorillawalker.com/children-s-encyclopedia-space-universe.pdf
    • http://www.gorillawalker.com/mental-hygiene-better-living-through-classroom-films-1945-1970.pdf
    • http://www.gorillawalker.com/armorbearer-training-series-in-the-spirit-of-armorbearing-revised-and.pdf
    • http://www.gorillawalker.com/bikes-scooters-skates-and-boards-how-to-buy-em-fix.pdf
    • http://www.gorillawalker.c
    • 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#
    +1 more URL(s)

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