Malicious PDF — malware analysis report

Static analysis result for SHA-256 9da53ddab08a641c…

MALICIOUS

PDF

68.2 KB Created: 2021-02-13 18:47:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f55d3ecdbb2880e890a6d25f4e3a3d24 SHA-1: 7ccea15e628611689a0b7ae5e3d02a111162df91 SHA-256: 9da53ddab08a641ceabb3a8b3deb25d3f0af4b4e0ab19954ab4438abc2711b03
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a malicious domain, likely intended for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to trick users into visiting a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 https://seumenha.ru/wix?keyword=section+2+physical+and+chemical+changes+answers
    • http://iciko.xyz/mutoturuguzitelufrwkc.pdf
    • https://cdn.sqhk.co/rufebumu/Fgghcic/steamship_authority_reservations_2019.pdf
    • http://rollernefritmassage.xyz/thanksgiving_activities_for_5th_gradezqohl.pdf
    • http://kersita.space/35897844717p1ejk.pdf
    • https://julavatevimire.weebly.com/uploads/1/3/4/6/134669339/e0b6c696.pdf
    • https://cdn-cms.f-static.net/uploads/4451227/normal_5fe6a9b37bb72.pdf
    • https://kigumafu.weebly.com/uploads/1/3/4/1/134131380/gabisidutobo-tipulemosol-nesifawere-bilebop.pdf
    • http://tersq.fun/dugumivwmrjv.pdf
    • https://timurikamaz.weebly.com/uploads/1/3/1/4/131406182/232fa67400152.pdf
    • https://static.s123-cdn-static.com/uploads/4486534/normal_600809d76a90f.pdf
    • https://cdn.sqhk.co/wodabumamuv/hghaFgi/afk_arena_best_heroes_late_game.pdf
    • http://setifol.66ghz.com/90993836991.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vemesedesalo.rf.gd/28153973474.pdf
    • http://renirorevebu.epizy.com/math-_drills_answer_key_rotations.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc18.bin
eb058559d12bbe827a8703306284b1d14487d98ac9065cf806821f5bdf2a8f79		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC18 5916 bytes
font_01_sfnt_off0000e02b.bin
ee7d23d5b27498cdf662533f0640effbe92ad582e69684fcd4a33e7ea0645ec9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE02B 10472 bytes

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