Malicious PDF — malware analysis report

Static analysis result for SHA-256 89b806e00a378aef…

MALICIOUS

PDF

42.3 KB Created: 2019-02-14 08:12:21 +03:00 Authoring application: TeX (via pdfTeX-0.13d)
MD5: dc1cd94455c3995d5f4b610ec9053ff4 SHA-1: a75334101213563a49d163db628719735e1d3f07 SHA-256: 89b806e00a378aef3e259a61e5f15bde659e8a379895b3beeb5ec0ef69e6f927
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links pointing to external PDF files, a technique often used for SEO manipulation or to distribute further malicious content. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted from this sample, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

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/365-division-worksheets-with-3-digit-dividends-2-digit-divisors.pdf
    • http://www.gorillawalker.com/guinea-immigration-laws-and-regulations-handbook-strategic-information-and-basic.pdf
    • http://www.gorillawalker.com/violin-with-piano-accompaniment-with-cd-audio-solo-plus.pdf
    • http://www.gorillawalker.com/liability-insurance-the-contemporary-insurance-translations-english-colin-smith-book.pdf
    • http://www.gorillawalker.com/the-ultimate-encyclopedia-of-aquarium-fish-and-fish-care.pdf
    • http://www.gorillawalker.com/help-yourself-to-essential-french-grammar.pdf
    • http://www.gorillawalker.com/bridge-lessons-double.pdf
    • http://www.gorillawalker.com/labyrinths-of-power-political-recruitment-in-twentieth-century-mexico-princeton.pdf
    • http://www.gorillawalker.com/malta-10-great-walks-kindle-edition.pdf
    • http://www.gorillawalker.com/gender-swap-trifecta-gender-transformation-feminization-erotica-bundle.pdf
    • http://www.gorillawalker.com/the-eastern-front-1914-1917-unabridged-audible-audio-edition.pdf
    • http://www.gorillawalker.com/handbook-of-the-economics-of-innovation-and-technological-change.pdf
    • http://www.gorillawalker.com/story-of-northern-rhodesia-regiment.pdf
    • http://www.gorillawalker.com/go-clean-sexy-you-a-seasonal-guide-to-detoxing-and.pdf
    • http://www.gorillawalker.com/history-of-the-fifty-fourth-regiment-of-massachusetts-volunteer-infantry.pdf
    • http://www.gorillawalker.com/basher-basics-space-exploration.pdf
    • http://www.gorillawalker.com/wisconsin-poets-calendar-2001.pdf
    • http://www.gorillawalker.com/competition-law-and-the-enforcement-of-article-102.pdf
    • http://www.gorillawalker.com/the-taming-of-the-shrew-shakespeare-in-production.pdf
    • http://www.gorillawalker.com/tantric-secrets-7-steps-to-the-best-sex-of-your.pdf
    • http://www.gorillawalker.com/partnerships-for-reducing-landslide-risk-assessment-of-the-national-landslide.pdf
    • http://www.gorillawalker.com/mirror-dance-a-vorkosigan-adventure.pdf
    • http://www.gorillawalker.com/pediatricians-ignore-nhlbi-asthma-classifications-terminology-use-correlated-with-better.pdf
    • http://www.gorillawalker.com/o-clap-your-hands-vocal-score-john-rutter-anniversary-edition.pdf
    • http://www.gorillawalker.com/intensive-records-management.pdf
    • http://www.gorillawalker.com/early-days-of-oil-a-pictorial-history-of-the-beginnings.pdf
    • http://www.gorillawalker.com/gace-middle-grades-mathematics-study-guide-test-prep-and-practice.pdf
    • http://www.gorillawalker.com/warriors-british-fighting-heroes.pdf
    • http://www.gorillawalker.com/corazon-aquino-president-of-the-philippines.pdf
    • http://www.gorillawalker.com/a-preface-to-logic.pdf
    • http://www.gorillawalker.com/pond-webs-of-life.pdf
    • http://www.gorillawalker.com/the-mask-omnibus-volume-1-v-1.pdf
    • http://www.gorillawalker.com/a-short-history-of-wine.pdf
    • http://www.gorillawalker.com/the-american-nation-volume-1-books-a-la-carte-edition.pdf
    • http://www.gorillawalker.com/vintage-a-ghost-story-kindle-edition.pdf
    • http://www.gorillawalker.com/italians-of-san-joaquin-county-images-of-america.pdf
    • http://www.gorillawalker.com/airline-marketing-and-management.pdf
    • http://www.gorillawalker.com/effective-communications-for-the-technical-professions.pdf
    • http://www.gorillawalker.com/sudetenland-wegweiser-durch-ein-unvergessenes-land-wegweiser-durch-unvergessenes-land.pdf
    • http://www.gorillawalker.com/code-of-virginia-1950-with-provision-for-subsequent-pocket-parts.pdf
    • http://www.gorillawalker.com/the-ultimate-encyclopedia-of-aquarium-fish-
    • 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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