Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3591c836660d46e…

MALICIOUS

PDF

73.1 KB Created: 2021-03-01 18:32:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 2dd32795b0e123e9671db1769f8cf27a SHA-1: afca3df9988312ea4e223db12b537e3cb7f56a80 SHA-256: f3591c836660d46eaea3481f3cf43938c121266cd33be66b2bd0c3e9fb4e07d0
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gimoguvi.ru/award?keyword=christmas+carol+characters+movie PDF link annotation
    • https://cdn.sqhk.co/damukowabij/iijhWhd/sniper_strike_shoot_killer_game_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462982/normal_603459c9980de.pdfIn PDF document text
    • https://cdn.sqhk.co/jawuraxexije/pibicGz/attitude_baddie_captions_for_instagram.pdfIn PDF document text
    • https://cdn.sqhk.co/bigulikexupa/SjeDohi/xuzuxikerudopodevobij.pdfIn PDF document text
    • https://bodonoweti.weebly.com/uploads/1/3/1/8/131856710/pamunira.pdfIn PDF document text
    • https://dopilefuma.weebly.com/uploads/1/3/4/7/134733068/19b88675df62d8.pdfIn PDF document text
    • https://cdn.sqhk.co/gobejilu/jHggPij/jailed_for_freedom_book.pdfIn PDF document text
    • https://sedapelagug.weebly.com/uploads/1/3/4/1/134109100/183265b04d86ae4.pdfIn PDF document text
    • https://xozilozevaloda.weebly.com/uploads/1/3/5/3/135391373/saben.pdfIn PDF document text
    • https://cdn.sqhk.co/farafakilof/dK8Zjgr/zetobimafidiwiwokon.pdfIn PDF document text
    • http://vijevejumozugim.sportsontheweb.net/the_complete_works_of_swami_vivekananda_volume_1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371248/normal_5ffadbc2a907a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454971/normal_601b1027c844a.pdfIn PDF document text
    • http://vijevejumozugim.sportsontheweb.net/25916078362.pdfIn PDF document text
    • https://cdn.sqhk.co/govizanorev/ghmgjAm/super_tank_blitz_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/ludozenidi/figUiaj/pafexufufumeb.pdfIn PDF document text
    • https://daxodewime.weebly.com/uploads/1/3/1/3/131398188/e5377881.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/gafedupeba/wajedotilunedonusinakuj.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/bekhayali_lyrics_video_free.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_off0000e375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE375 5004 bytes
SHA-256: 76c5cd7d72cc9a797e00145aee7e875845d450d8a6743b4fb609008347226ade
font_01_sfnt_off0000f443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF443 10316 bytes
SHA-256: 59e353a6958fbc9b1256e001c1cb0d73e82712990f3f63f56eb9567d0b8f5356

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