Malicious PDF — malware analysis report

Static analysis result for SHA-256 808f871870d8a120…

MALICIOUS

PDF

35.2 KB Created: 2019-12-13 23:22:03 +03:00 Authoring application: Sejda (Ver. 1.0.0.M6-SNAPSHOT) (via iText 2.1.7 by 1T3XT) First seen: 2020-02-04
MD5: e151dbe072f1e320907fd2c414201df7 SHA-1: 412d548b0fe470f2f3c4de0e89043dbe1c83589d SHA-256: 808f871870d8a120b177c2d666f02ae82f271f322ea48c4ebe5c6d9884a07826
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. The ML classifier also flagged the document as malicious. While no scripts were extracted, the sheer volume of links suggests an attempt to manipulate search engine results or distribute content from a potentially malicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8018

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/behind-the-war-on-terror-western-secret-strategy-and-the.pdf In PDF document text
    • http://www.gorillawalker.com/eine-kleine-nachtmusik-grade-3-flute-solo-w-a-mozart.pdfIn PDF document text
    • http://www.gorillawalker.com/the-high-valley.pdfIn PDF document text
    • http://www.gorillawalker.com/papa-francisco-esta-econom-a-mata-mundo-y-cristianismo-spanish.pdfIn PDF document text
    • http://www.gorillawalker.com/altbier-history-brewing-techniques-recipes-classic-beer-style-series-12.pdfIn PDF document text
    • http://www.gorillawalker.com/microwave-and-radar-engineering.pdfIn PDF document text
    • http://www.gorillawalker.com/the-missing-mitt-hardy-boys-the-secret-files.pdfIn PDF document text
    • http://www.gorillawalker.com/motor-learning-in-practice-a-constraints-led-approach.pdfIn PDF document text
    • http://www.gorillawalker.com/turn-back-time-the-high-street.pdfIn PDF document text
    • http://www.gorillawalker.com/broom-corn-and-brooms-a-treatise-on-raising-broom-corn.pdfIn PDF document text
    • http://www.gorillawalker.com/sister-sarah-s-pick-5-sure-shot-win-now-kindle.pdfIn PDF document text
    • http://www.gorillawalker.com/bath-groundcover.pdfIn PDF document text
    • http://www.gorillawalker.com/stones-in-the-road-photographs-of-peru.pdfIn PDF document text
    • http://www.gorillawalker.com/that-pesky-dragon.pdfIn PDF document text
    • http://www.gorillawalker.com/gravitational-collapse-and-spacetime-singularities-cambridge-monographs-on-mathematical-physics.pdfIn PDF document text
    • http://www.gorillawalker.com/u-s-army-special-forces-power.pdfIn PDF document text
    • http://www.gorillawalker.com/kick-ass-2.pdfIn PDF document text
    • http://www.gorillawalker.com/primer-of-biostatistics-seventh-edition-primer-of-biostatistics-glantz-paperback.pdfIn PDF document text
    • http://www.gorillawalker.com/science-and-technology-of-integrated-ferroelectrics-selected-papers-from-eleven.pdfIn PDF document text
    • http://www.gorillawalker.com/born-to-organize-everything-you-need-to-know-about-a.pdfIn PDF document text
    • http://www.gorillawalker.com/in-fitting-memory-the-art-and-politics-of-holocaust-memorials.pdfIn PDF document text
    • http://www.gorillawalker.com/constitutional-law-for-dummies.pdfIn PDF document text
    • http://www.gorillawalker.com/history-and-activities-of-the-west-african-kingdoms-hands-on.pdfIn PDF document text
    • http://www.gorillawalker.com/2520-prophecy-s-blind-date-kindle-edition.pdfIn PDF document text
    • http://www.gorillawalker.com/enhancing-rti-how-to-ensure-success-with-effective-classroom-instruction.pdfIn PDF document text
    • http://www.gorillawalker.com/danse-macabre-close-encounters-with-the-reaper.pdfIn PDF document text
    • http://www.gorillawalker.com/introduction-to-no-knead-turbo-bread-ready-to-bake-in.pdfIn PDF document text
    • http://www.gorillawalker.com/introduction-to-general-topology-holden-day-series-in-mathematics.pdfIn PDF document text
    • http://www.gorillawalker.com/el-economista-camuflado-the-undercover-economist-spanish-edition.pdfIn PDF document text
    • http://www.gorillawalker.com/shark-in-our-pool.pdfIn PDF document text
    • http://www.gorillawalker.com/programming-games-with-visual-c-express.pdfIn PDF document text
    • http://www.gorillawalker.com/simple-old-fashioned-baking-the-best-recipes-from-grandma-s.pdfIn PDF document text
    • http://www.gorillawalker.com/reading-the-letters-of-pliny-the-younger-an-introduction.pdfIn PDF document text
    • http://www.gorillawalker.com/talking-dirty-slang-expletives-and-curses-from-around-the-world.pdfIn PDF document text
    • http://www.gorillawalker.com/the-monsoons-india-the-land-and-the-people.pdfIn PDF document text
    • http://www.gorillawalker.com/the-complete-show-jumper-a-training-manual-for-successful-show.pdfIn PDF document text
    • http://www.gorillawalker.com/the-2013-import-and-export-market-for-printed-books-pamphlets.pdfIn PDF document text
    • http://www.gorillawalker.com/working-girl-brock-and-poole.pdfIn PDF document text
    • http://www.gorillawalker.com/your-instinct-in-action-a-personal-application-guide-to-instinct.pdfIn PDF document text
    • http://www.gorillawalker.com/personal-reminiscences-of-general-robert-e-lee.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://www.aiim.org/pdfa/ns/extension/In PDF document text
    • http://www.aiim.org/pdfa/ns/schema#In PDF document text
    • http://www.aiim.org/pdfa/ns/property#In PDF document text
    • http://www.aiim.org/pdfa/ns/id/In PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_001_off00000d33.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD33 15945 bytes
SHA-256: a24684557c2e2a26020492cffc0fa976f4a849ee4e873fc713ccd015e97af960

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