Malicious PDF — malware analysis report

Static analysis result for SHA-256 76d0b71b918daaa6…

MALICIOUS

PDF

42.9 KB Created: 2018-11-23 21:00:52 +03:00 Authoring application: PageMaker 6.5 (via Acrobat Distiller 4.05 for Windows)
MD5: b83d03e2290b5b707be92258fa257e84 SHA-1: 284366cd81d4e1bbe4d0a2595257d2c76ae76141 SHA-256: 76d0b71b918daaa687524648779b3c123875a3cf62f60fa979c61511a597029a
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to external PDF files, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. While no scripts were explicitly extracted, the ML classifier and the sheer volume of links suggest a malicious intent, possibly for SEO manipulation or to serve as a distribution point for other malicious content. The primary IOCs are the numerous URLs hosted on www.gorillawalker.com.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8856

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/monkey-s-clever-tale-traditional-tale-with-a-twist.pdf
    • http://www.gorillawalker.com/ludovico-einaudi-divenire-pf-bk.pdf
    • http://www.gorillawalker.com/the-specialized-society-the-plight-of-the-individual-in-an.pdf
    • http://www.gorillawalker.com/restorative-justice-dialogue-an-essential-guide-for-research-and-practice.pdf
    • http://www.gorillawalker.com/a-history-of-their-own-women-in-europe-from-prehistory.pdf
    • http://www.gorillawalker.com/1969-dream-1-drum-corps-cd-blessed-sacrament-garfield-st.pdf
    • http://www.gorillawalker.com/values-in-a-time-of-upheaval.pdf
    • http://www.gorillawalker.com/bonsai-miniature-potted-trees.pdf
    • http://www.gorillawalker.com/will-shortz-presents-simply-sinister-sudoku-200-hard-puzzles.pdf
    • http://www.gorillawalker.com/tight-and-taut-immersions-of-manifolds-chapman-hall-crc-research.pdf
    • http://www.gorillawalker.com/dovetale-the-bombshell-that-rocked-hong-kong-kindle-edition.pdf
    • http://www.gorillawalker.com/the-korean-repository-volume-5.pdf
    • http://www.gorillawalker.com/the-ancestor-s-tale-a-pilgrimage-to-the-dawn-of.pdf
    • http://www.gorillawalker.com/tennessee-from-the-mississippi-river-to-the-smoky-mountains.pdf
    • http://www.gorillawalker.com/pasta-every-way-for-every-day.pdf
    • http://www.gorillawalker.com/ultimate-brain.pdf
    • http://www.gorillawalker.com/meditations-to-change-your-brain.pdf
    • http://www.gorillawalker.com/health-care-reform-and-disparities-history-hype-and-hope.pdf
    • http://www.gorillawalker.com/james-ii-the-last-catholic-king-penguin-monarchs.pdf
    • http://www.gorillawalker.com/torn-torn-book-1-unabridged-audible-audio-edition.pdf
    • http://www.gorillawalker.com/grammar-in-context-1-fourth-edition-student-book-bk-1.pdf
    • http://www.gorillawalker.com/the-hidden-history-of-the-secret-ballot-paperback.pdf
    • http://www.gorillawalker.com/cantos-para-jugar-1-songs-to-play-1-spanish-edition.pdf
    • http://www.gorillawalker.com/l-etranger-twentieth-century-french-texts.pdf
    • http://www.gorillawalker.com/vegan-comfort-food-recipes-tasty-delicious-vegan-meals-to-satisfy.pdf
    • http://www.gorillawalker.com/the-glass-lake-a-novel.pdf
    • http://www.gorillawalker.com/percussion-exam-pieces-studies-snare-drum-book-1-grades-1.pdf
    • http://www.gorillawalker.com/steck-vaughn-mastering-math-student-edition-level-a.pdf
    • http://www.gorillawalker.com/sports-and-entertainment-of-the-2000s-the-decade-of-the.pdf
    • http://www.gorillawalker.com/the-physics-of-vlsi-aip-conference-proceedings-number-122.pdf
    • http://www.gorillawalker.com/cosi-fan-tutti-vocal-score-barenreiter-urtext-kv-588.pdf
    • http://www.gorillawalker.com/f-scott-fitzgerald-s-short-stories-bloom-s-modern-critical.pdf
    • http://www.gorillawalker.com/faster-stark-ink-book-3.pdf
    • http://www.gorillawalker.com/vaccine-whistleblower-exposing-autism-research-fraud-at-the-cdc.pdf
    • http://www.gorillawalker.com/technical-communication-a-practical-approach-books-a-la-carte-plus.pdf
    • http://www.gorillawalker.com/tell-them-i-m-eccentric-living-life-as-a-baltimore.pdf
    • http://www.gorillawalker.com/una-frase-para-cada-d.pdf
    • http://www.gorillawalker.com/ria-federal-tax-handbook-2007.pdf
    • http://www.gorillawalker.com/butterflies-2016-two-year-planner.pdf
    • http://www.gorillawalker.com/rsmeans-construction-cost-indexes-april-2015.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://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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