Malicious PDF — malware analysis report

Static analysis result for SHA-256 44ed1cd5afeda42a…

MALICIOUS

PDF

44.4 KB Created: 2019-03-18 07:17:00 +03:00 Authoring application: - (via Multivalent Merge) First seen: 2019-04-18
MD5: c5506d275f51da08c4fab4c4372b5c0c SHA-1: 67275dda16f42801365413769557aeaca5c9d06e SHA-256: 44ed1cd5afeda42a39fafa42cb98f070f4cea700c8b6df7c7221cd9b53091fa6
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF document contains numerous embedded URLs, all pointing to the same domain 'gorillawalker.com' but with different book titles in the path. This suggests a social engineering tactic to trick users into downloading files disguised as legitimate content. The ML classifier also flagged this PDF as malicious, increasing the confidence in this assessment. No scripts were extracted, and the document body was not parsable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8224

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/bon-appetit-a-novel-french-twist-book-2.pdf In PDF document text
    • http://www.gorillawalker.com/good-life-cooking-light-classics-from-today-s-gourmet-pepin.pdfIn PDF document text
    • http://www.gorillawalker.com/from-the-heart-my-autobiography.pdfIn PDF document text
    • http://www.gorillawalker.com/kaplan-gre-exam-advanced-verbal-your-only-guide-to-an.pdfIn PDF document text
    • http://www.gorillawalker.com/the-dc-comics-guide-to-pencilling-comics-paperback-2001-author.pdfIn PDF document text
    • http://www.gorillawalker.com/te-wahi-pounamu-the-place-of-greenstone.pdfIn PDF document text
    • http://www.gorillawalker.com/fotografia-de-alto-rango-dinamico-high-dynamic-range-photography-spanish.pdfIn PDF document text
    • http://www.gorillawalker.com/at-the-cross-hallelujah-glenn-packiam-satb-satb-sheet-music.pdfIn PDF document text
    • http://www.gorillawalker.com/faith-and-beauty-a-theological-aesthetic.pdfIn PDF document text
    • http://www.gorillawalker.com/right-turn-american-life-in-the-reagan-bush-era-1980.pdfIn PDF document text
    • http://www.gorillawalker.com/violin-exam-pieces-2016-2019-abrsm-grade-7-score-part.pdfIn PDF document text
    • http://www.gorillawalker.com/matthews-plant-virology.pdfIn PDF document text
    • http://www.gorillawalker.com/costume-1066-1990s.pdfIn PDF document text
    • http://www.gorillawalker.com/omer-a-counting.pdfIn PDF document text
    • http://www.gorillawalker.com/fire-and-smoke-the-essential-barbeque.pdfIn PDF document text
    • http://www.gorillawalker.com/the-if-man-dr-leander-starr-jameson-the-inspiration-for.pdfIn PDF document text
    • http://www.gorillawalker.com/trinity-alien-encounter-1-invasion-no-1-paperback.pdfIn PDF document text
    • http://www.gorillawalker.com/emerging-systems-for-managing-workplace-conflict-lessons-from-american-corporations.pdfIn PDF document text
    • http://www.gorillawalker.com/power-video-poker.pdfIn PDF document text
    • http://www.gorillawalker.com/failure-mode-and-effects-analysis-in-health-care-proactive-risk.pdfIn PDF document text
    • http://www.gorillawalker.com/indy-the-great-american-race-out-to-win.pdfIn PDF document text
    • http://www.gorillawalker.com/still-life-chief-inspector-armand-gamache-mysteries-no-1.pdfIn PDF document text
    • http://www.gorillawalker.com/the-shape-of-athenian-law-clarendon-paperbacks.pdfIn PDF document text
    • http://www.gorillawalker.com/live-the-life-you-love-postcard-box-100-hand-lettered.pdfIn PDF document text
    • http://www.gorillawalker.com/the-age-of-cryptocurrency-how-bitcoin-and-digital-money-are.pdfIn PDF document text
    • http://www.gorillawalker.com/water-resource-management-a-casebook-in-law-and-public-policy.pdfIn PDF document text
    • http://www.gorillawalker.com/skip-beat-vol-10.pdfIn PDF document text
    • http://www.gorillawalker.com/swimming-jump-into-sports.pdfIn PDF document text
    • http://www.gorillawalker.com/baboons-blastoff-readers-level-1.pdfIn PDF document text
    • http://www.gorillawalker.com/modern-missile-guidance.pdfIn PDF document text
    • http://www.gorillawalker.com/transatlantic-transformations-equipping-nato-for-the-21st-century.pdfIn PDF document text
    • http://www.gorillawalker.com/exercise-and-disease-management-second-edition.pdfIn PDF document text
    • http://www.gorillawalker.com/the-administration-of-justice-in-medieval-india-a-study-in.pdfIn PDF document text
    • http://www.gorillawalker.com/hamish-x-goes-to-providence-rhode-island.pdfIn PDF document text
    • http://www.gorillawalker.com/chapman-knots-a-chapman-nautical-guide.pdfIn PDF document text
    • http://www.gorillawalker.com/catching-dreams-my-life-in-the-negro-baseball-leagues-sports.pdfIn PDF document text
    • http://www.gorillawalker.com/clinical-laboratory-evaluation-for-the-chiropractic-profession.pdfIn PDF document text
    • http://www.gorillawalker.com/chess-training-cadogan-chess-books.pdfIn PDF document text
    • http://www.gorillawalker.com/kensuke-s-kingdom-mass-market-paperback.pdfIn PDF document text
    • http://www.gorillawalker.com/yellow-summer.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_002_off00001bef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1BEF 35814 bytes
SHA-256: a73966ec12c23d370540ecdb18f013c80c3d71cf56b3ebab105a58a3e88c5941

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