Malicious PDF — malware analysis report

Static analysis result for SHA-256 2547d692d20fe13a…

MALICIOUS

PDF

44.6 KB Created: 2019-04-04 19:28:43 +03:00 Authoring application: calibre 2.23.0 [http://calibre-ebook.com]
MD5: 5f28c7021abf6cf80133041336c37a66 SHA-1: dedf7f9766fc716da27fbcba9ef80762362093e3 SHA-256: 2547d692d20fe13a39b154afc74fec274a75613d917ea33fda334fc8c9c099d8
90 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier as malicious and contains a large number of embedded external links, a technique often used for SEO manipulation or to host further malicious content. The document body itself is heavily obfuscated and does not provide clear textual lures, but the presence of numerous links to seemingly unrelated PDF documents suggests a link farm or distribution mechanism. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8173

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/collins-design-and-technology-textiles-foundation-course-collins-design-technology.pdf
    • http://www.gorillawalker.com/the-solid-state-chemistry-of-binary-metal-hydrides-the-physical.pdf
    • http://www.gorillawalker.com/one-wonderful-curve-12-contemporary-quilts.pdf
    • http://www.gorillawalker.com/a-polar-bear-can-swim-easy-to-read-viking.pdf
    • http://www.gorillawalker.com/the-children-act-a-social-care-guide.pdf
    • http://www.gorillawalker.com/close-call-a-jack-doyle-mystery-jack-doyle-series.pdf
    • http://www.gorillawalker.com/manga-pose-resource-book-1-bk-1.pdf
    • http://www.gorillawalker.com/the-sierra-leone-special-court-collection-volume-b-4-1.pdf
    • http://www.gorillawalker.com/children-s-picture-encyclopedia.pdf
    • http://www.gorillawalker.com/adult-literacy-policy-and-practice-from-intrinsic-values-to-instrumentalism.pdf
    • http://www.gorillawalker.com/free-to-learn-why-unleashing-the-instinct-to-play-will.pdf
    • http://www.gorillawalker.com/field-notes-from-the-grand-canyon-raging-river-quiet-mind.pdf
    • http://www.gorillawalker.com/modern-card-counting-modern-blackjack-card-counting-techniques-and-systems.pdf
    • http://www.gorillawalker.com/relief-valve.pdf
    • http://www.gorillawalker.com/opportunity-programs-opening-the-doors-to-higher-education-hearing-of.pdf
    • http://www.gorillawalker.com/meade-s-breakthrough-at-fredericksburg.pdf
    • http://www.gorillawalker.com/my-love-will-set-you-free-a-cupid-s-bow.pdf
    • http://www.gorillawalker.com/ladies-home-journal-100-great-cookie-recipes.pdf
    • http://www.gorillawalker.com/more-is-more-tony-duquette.pdf
    • http://www.gorillawalker.com/steck-vaughn-focus-on-math-student-edition-grade-5-level.pdf
    • http://www.gorillawalker.com/single-subject-research-application-in-educational-and-clinical-settings.pdf
    • http://www.gorillawalker.com/ambushed-by-a-cougar-close-encounters-of-the-wild-kind.pdf
    • http://www.gorillawalker.com/uniforms-of-the-ss-volume-1.pdf
    • http://www.gorillawalker.com/el-mundo-de-la-cerveza-artesanal-the-world-of-craft.pdf
    • http://www.gorillawalker.com/nighthag.pdf
    • http://www.gorillawalker.com/the-ray-bradbury-chronicles-volume-3.pdf
    • http://www.gorillawalker.com/the-future-life-according-to-orthodox-teaching.pdf
    • http://www.gorillawalker.com/case-briefs-tort-law-vetri-4th-case-briefs-by-rom.pdf
    • http://www.gorillawalker.com/abracadabra-flute-technique-pupil-s-book-abracadabra-woodwind.pdf
    • http://www.gorillawalker.com/prevention-in-clinical-oral-health-care.pdf
    • http://www.gorillawalker.com/an-evaluation-of-foods-processed-in-tray-pack-versus-two.pdf
    • http://www.gorillawalker.com/deep-web-book-5-the-crush-saga-kindle-edition.pdf
    • http://www.gorillawalker.com/dr-atkins-age-defying-diet.pdf
    • http://www.gorillawalker.com/rust-belt.pdf
    • http://www.gorillawalker.com/fodor-s-1999-las-vegas-reno-tahoe.pdf
    • http://www.gorillawalker.com/color-me-arnold-the-unofficial-arnold-schwarzenegger-coloring-and-activity.pdf
    • http://www.gorillawalker.com/el-agente-secreto-de-dios-la-vida-del-hermano-andr.pdf
    • http://www.gorillawalker.com/pawns-in-a-greater-game-the-buenos-aires-chess-olympiad.pdf
    • http://www.gorillawalker.com/us-army-technical-manual-tm-55-1905-219-20p-2.pdf
    • http://www.gorillawalker.com/designing-language-courses-a-guide-for-teachers.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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