Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a0bc9a56419e824…

MALICIOUS

PDF

74.4 KB Created: 2021-03-13 21:03:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 058f036174fa42e02877550131466fa3 SHA-1: 6db85475cc1dd5ee9c1146da456d71a993a64be3 SHA-256: 2a0bc9a56419e8240e0956685085e2047b226ae9b4d3320ff06e5ab8c575df64
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'dugedepap.ru', which is likely a malicious domain used to serve a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'fundamentals of electrical power engineering pdf'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/award?keyword=fundamentals+of+electrical+power+engineering+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4458849/normal_604876bbaef52.pdfIn PDF document text
    • https://cdn.sqhk.co/tawunipufop/bieYhhT/96048162703.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/jdhdKjh/sta_izaziva_zujanje_u_usima.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411219/normal_5fd2d30d731dd.pdfIn PDF document text
    • http://demask.fun/tifikojsyegd.pdfIn PDF document text
    • https://cdn.sqhk.co/tamejenonisi/gjjazii/kifabolavijakisuk.pdfIn PDF document text
    • https://cdn.sqhk.co/wimedizi/iqJXVgd/hanayama_puzzles_level_5_vortex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462059/normal_5feb375771d73.pdfIn PDF document text
    • https://cdn.sqhk.co/mudemodox/j3eseoh/pisefuwelasisu.pdfIn PDF document text
    • https://cdn.sqhk.co/savageven/gi46igL/zisogoxo.pdfIn PDF document text
    • https://cdn.sqhk.co/remimidotomi/cjcuDL6/ice_hockey_goalie_camps_2019_michigan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479460/normal_6047a920160be.pdfIn PDF document text
    • https://cdn.sqhk.co/xunijejozi/jbgeTdk/xobuwolefen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485702/normal_5fe05e03c8595.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475730/normal_602c1fd3b001b.pdfIn PDF document text
    • http://huseyincanx.com/74982755978y2s3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365567/normal_5fd2a7430d0e6.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/sugosubexez/18617771432.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/amelie_comptine_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/19224167603.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/bhamashah_wallet_app.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_off0000e537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE537 5520 bytes
SHA-256: 90dc9874baf67cf693f1185b40afd2c4e597b7e5861064f4d6110a5a0ebf7b57
font_01_sfnt_off0000f803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF803 10488 bytes
SHA-256: 94ae14203f651b218f325e728af2495f539c7d17498bda9ce7c1469cc6ab411a

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