Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b7d6729ba382a84…

MALICIOUS

PDF

43.4 KB Created: 2018-12-15 08:11:11 +03:00 Authoring application: Acrobat PDFMaker 5.0 for Word (via Acrobat Distiller 5.0 (Windows)) First seen: 2019-01-12
MD5: b1b15d6083d55df542b4970e9f062b56 SHA-1: 13be5a9598872ba30298c47563ca3861a59e217b SHA-256: 7b7d6729ba382a8428a01bb44231ef90dc1d527c05a8cc326d787f1550d73200
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded URLs pointing to PDF files on the same domain, indicative of a link farm or SEO manipulation tactic. While no specific malicious script was directly observed in the document body, the presence of an embedded JavaScript stream and the critical heuristic firing for a PDF link farm suggest the document is designed to direct users to potentially malicious or deceptive content hosted on the `gorillawalker.com` domain. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9171

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/kaplan-nclex-rn-medications-in-a-box.pdf In PDF document text
    • http://www.gorillawalker.com/the-nag-hammadi-scriptures-the-revised-and-updated-translation-of.pdfIn PDF document text
    • http://www.gorillawalker.com/fundamentals-of-managing-reference-collections-ala-fundamentals.pdfIn PDF document text
    • http://www.gorillawalker.com/futa-rising-corporal-cherry-s-futanari-adventures-book-3.pdfIn PDF document text
    • http://www.gorillawalker.com/coloproctology-springer-specialist-surgery-series.pdfIn PDF document text
    • http://www.gorillawalker.com/veni-sancte-spiritus-choral-octavo-faber-edition-faber-new-choral.pdfIn PDF document text
    • http://www.gorillawalker.com/new-maths-in-action-s3-3-student-book.pdfIn PDF document text
    • http://www.gorillawalker.com/the-battle-of-betazed-star-trek-next-generation-unnumbered.pdfIn PDF document text
    • http://www.gorillawalker.com/the-fisherman.pdfIn PDF document text
    • http://www.gorillawalker.com/heroics-for-beginners.pdfIn PDF document text
    • http://www.gorillawalker.com/cry-of-the-peacock-a-novel-kindle-edition.pdfIn PDF document text
    • http://www.gorillawalker.com/the-story-of-the-manhattan-project-monumental-milestones-great-events.pdfIn PDF document text
    • http://www.gorillawalker.com/global-sport-for-development-critical-perspectives-global-culture-and-sport.pdfIn PDF document text
    • http://www.gorillawalker.com/semiconductor-terahertz-technology-devices-and-systems-at-room-temperature-operation.pdfIn PDF document text
    • http://www.gorillawalker.com/o-brien-s-radiology-for-the-ambulatory-equine-practitioner.pdfIn PDF document text
    • http://www.gorillawalker.com/ecclesiastes-geneva-series-of-commentaries.pdfIn PDF document text
    • http://www.gorillawalker.com/am-i-small-je-suis-petite-moi-children-s-picture.pdfIn PDF document text
    • http://www.gorillawalker.com/heroes-of-olympus-book-one-the-lost-hero-the-graphic.pdfIn PDF document text
    • http://www.gorillawalker.com/introduction-to-leadership-concepts-and-practice-kindle-edition.pdfIn PDF document text
    • http://www.gorillawalker.com/long-tail-kitty-come-out-and-play.pdfIn PDF document text
    • http://www.gorillawalker.com/the-fathers-of-the-church-a-comprehensive-introduction.pdfIn PDF document text
    • http://www.gorillawalker.com/dear-mrs-roosevelt-letters-from-children-of-the-great-depression.pdfIn PDF document text
    • http://www.gorillawalker.com/jesus-the-one-and-only.pdfIn PDF document text
    • http://www.gorillawalker.com/2014-vintage-guitars-double-view-easel.pdfIn PDF document text
    • http://www.gorillawalker.com/taboo-tales-house-on-the-hill.pdfIn PDF document text
    • http://www.gorillawalker.com/my-travel-journal-retro-building-illustration-travel-planner-journal-6.pdfIn PDF document text
    • http://www.gorillawalker.com/ogam-the-celtic-oracle-of-the-trees-understanding-casting-and.pdfIn PDF document text
    • http://www.gorillawalker.com/winter-demon-bundle.pdfIn PDF document text
    • http://www.gorillawalker.com/aromatherapy-perfume-blending-decoder-large-format.pdfIn PDF document text
    • http://www.gorillawalker.com/this-is-tanzania-a-collection-of-thoughts-and-reflections-from.pdfIn PDF document text
    • http://www.gorillawalker.com/rich-forests-poor-people-resource-control-and-resistance-in-java.pdfIn PDF document text
    • http://www.gorillawalker.com/the-daily-message-unabridged-audible-audio-edition.pdfIn PDF document text
    • http://www.gorillawalker.com/public-policymaking-reexamined.pdfIn PDF document text
    • http://www.gorillawalker.com/fuzzy-little-monkeys-klutz-chicken-socks.pdfIn PDF document text
    • http://www.gorillawalker.com/recipes-book-for-vegetarian-diet-cooking-chinese-edition.pdfIn PDF document text
    • http://www.gorillawalker.com/dude-did-i-steal-your-job-debugging-indian-computer-programmers.pdfIn PDF document text
    • http://www.gorillawalker.com/essentials-of-educational-psychology-big-ideas-to-guide-effective-teaching.pdfIn PDF document text
    • http://www.gorillawalker.com/book-of-tofu-food-for-mankind.pdfIn PDF document text
    • http://www.gorillawalker.com/loggers-guide-to-tagging-your-buck-kindle-edition.pdfIn PDF document text
    • http://www.gorillawalker.com/advances-in-the-study-of-behavior-volume-38.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_off00000cb2.js
f7fe3879b1e2b9715d15a5043fe178813853dd8898d1376b2aa20de49fce71eb		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xCB2 16590 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.