Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5ac1f518d52f1b4…

MALICIOUS

PDF

33.9 KB Created: 2019-05-24 00:42:57 +03:00 Authoring application: LaTeX with hyperref package (via pdfTeX-1.40.10)
MD5: baa04f8b632bd69c7663a899a939685d SHA-1: e40ca02bdbd44110d408ebe388359cd0c28e16e3 SHA-256: f5ac1f518d52f1b4fd30233f838d6b42fe72dbb2dbde3708b5e1cbb4312e3e5e
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links to external websites, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged the PDF as malicious. The document body is heavily obfuscated and does not provide clear textual lures, but the sheer volume of links suggests a malicious intent, possibly for SEO poisoning or to direct users to further malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8313

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/from-the-shadows-the-ultimate-insider-s-story-of-five.pdf
    • http://www.gorillawalker.com/music-symbol-bingo-teacher-s-book.pdf
    • http://www.gorillawalker.com/college-student-mental-health-counseling-a-developmental-approach.pdf
    • http://www.gorillawalker.com/ocr-a2-psychology-student-unit-guide-new-edition-unit-g543.pdf
    • http://www.gorillawalker.com/entertainment-law-cases-and-materials-in-established-and-emerging-media.pdf
    • http://www.gorillawalker.com/the-raga-guide-a-survey-of-74-hindustani-ragas.pdf
    • http://www.gorillawalker.com/pox-genius-madness-and-the-mysteries-of-syphilis-kindle-edition.pdf
    • http://www.gorillawalker.com/soil-mechanics-and-foundation-road-and-bridge-engineering-technology-used.pdf
    • http://www.gorillawalker.com/industrial-shift-the-structure-of-the-new-world-economy-palgrave.pdf
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    • http://www.gorillawalker.com/beyond-birth-social-status-in-the-emergence-of-modern-korea.pdf
    • http://www.gorillawalker.com/the-laser-book-laser-book-laser-sailing-from-start-to.pdf
    • http://www.gorillawalker.com/the-chrysalis-a-novel.pdf
    • http://www.gorillawalker.com/dr-earl-mindell-s-the-power-of-msm.pdf
    • http://www.gorillawalker.com/effective-small-business-management.pdf
    • http://www.gorillawalker.com/a-bone-to-pick-a-peggy-henderson-adventure.pdf
    • http://www.gorillawalker.com/confessions-of-a-chemist-community-pharmacist-kindle-edition.pdf
    • http://www.gorillawalker.com/understanding-chinese-characters-by-their-ancestral-forms.pdf
    • http://www.gorillawalker.com/the-total-mindset-the-practicing-mind-mp3-cd-audiobook-the.pdf
    • http://www.gorillawalker.com/into-wholeness-module-4-exploration-into-the-ministry-of-health.pdf
    • http://www.gorillawalker.com/gene-transfer-to-animal-cells-advanced-methods.pdf
    • http://www.gorillawalker.com/blood-rites-an-invitation-to-horror.pdf
    • http://www.gorillawalker.com/writing-inventions-identities-technologies-pedagogies.pdf
    • http://www.gorillawalker.com/creative-perspective.pdf
    • http://www.gorillawalker.com/data-structures-and-algorithms-with-javascript.pdf
    • http://www.gorillawalker.com/official-views-of-the-world-s-columbian-exposition-issued-by.pdf
    • http://www.gorillawalker.com/grillparzers-liebesroman-die-schwestern-frohlich-roman-aus-wiens-klassischer-zeit.pdf
    • http://www.gorillawalker.com/mistress-in-training.pdf
    • http://www.gorillawalker.com/audrey-at-home.pdf
    • http://www.gorillawalker.com/small-animal-orthopedics-rheumatology-and-musculoskeletal-disorders-self-assessment-color.pdf
    • http://www.gorillawalker.com/auge-y-caida-de-los-templarios-spanish-edition.pdf
    • http://www.gorillawalker.com/girl-sex-101-print-replica-kindle-edition.pdf
    • http://www.gorillawalker.com/competition-law-uruguay.pdf
    • http://www.gorillawalker.com/two-centuries-of-roman-poetry.pdf
    • http://www.gorillawalker.com/estates-and-future-interests-examples-and-explanations.pdf
    • http://www.gorillawalker.com/live-from-mongolia-from-wall-street-banker-to-mongolian
    • 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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