Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2fe1dfd4c4f7010…

MALICIOUS

PDF

72.4 KB Created: 2021-01-19 19:09:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 69856eaca9e9276b26a9b4f100547e71 SHA-1: 2b6c593da19d84a125f593183dcb6cc75c1a5027 SHA-256: d2fe1dfd4c4f701002a1780e236e06addf57a5ca1d6445c2440f90140a3bc18e
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, suggests a lure related to sheet music. The presence of external URIs and the ML classifier's high confidence indicate a phishing attempt designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/aws?utm_term=feel+so+close+sheet+music+pdf PDF link annotation
    • https://site-1168081.mozfiles.com/files/1168081/viwadivupatisat.pdfIn PDF document text
    • https://cdn.sqhk.co/feletitami/0jdNjbD/jesewejag.pdfIn PDF document text
    • https://cdn.sqhk.co/feluxolid/ndahhV0/85079504598.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/hyjd9ie/arrow_mill_warwickshire.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465252/normal_5fdd6ba655380.pdfIn PDF document text
    • https://cdn.sqhk.co/jivaduzar/Tggjfjj/speed_car_city_racing_3d_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/Vhbib15/vukosutusexosatenojom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451932/normal_5fc766c3c73e2.pdfIn PDF document text
    • https://cdn.sqhk.co/xidosisew/j1c1gge/nuvazizojuno.pdfIn PDF document text
    • https://cdn.sqhk.co/pugijuzo/Q44XVjb/13156235907.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388824/normal_5faa2b25807e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476301/normal_5fb89ddfcfc47.pdfIn PDF document text
    • https://cdn.sqhk.co/pozuwifofub/2lFtHji/niwabuxewojofew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446377/normal_5fa2f8208cfdd.pdfIn PDF document text
    • https://site-1173589.mozfiles.com/files/1173589/class_9_science_ncert_solutions_chapter_11.pdfIn PDF document text
    • https://cdn.sqhk.co/wafexumu/UTgiqYi/music_racer_apk_ios.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490264/normal_5ffef0525e7af.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/27905531207.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/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6A 5044 bytes
SHA-256: af5b5686ac8e3d8f278e2bdd6915c9bb91deb5adbe52465d09afb9cb386d76df
font_01_sfnt_off0000ef75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF75 11324 bytes
SHA-256: 5bd6052e64f592117cf71d78d2c015c339abab81d617f3829cd1700fbdeb45e0

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