Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d1b598915167b09…

MALICIOUS

PDF

79.6 KB Created: 2021-03-31 01:46:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c27e88674019ee80672307d177e96aba SHA-1: 73e60f5f45dcce14403d3b23fc2f245d979f1045 SHA-256: 1d1b598915167b09c9a1e3e0b11c126a865d1fb46d67a05e8ac447fd8bf07e1a
126 Risk Score

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of a phishing or link farm attack. It contains numerous embedded URLs, many pointing to disposable or link farm hosting, designed to redirect users to potentially harmful content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/123?utm_term=antimykotikum+in+tablettenform PDF link annotation
    • https://cdn.sqhk.co/pigexebobe/hDicieg/lemoxejomojivanavanuba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463808/normal_5fd12714f27c4.pdfIn PDF document text
    • https://jefibapo.weebly.com/uploads/1/3/2/7/132712451/kedabaxefemefen_xiles_zariwoso_jobonu.pdfIn PDF document text
    • https://nuvawusop.weebly.com/uploads/1/3/5/3/135302159/nifon.pdfIn PDF document text
    • https://komibaxes.weebly.com/uploads/1/3/1/6/131606619/6550632.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422628/normal_6005ea41e6f49.pdfIn PDF document text
    • https://cdn.sqhk.co/vewukiziwemi/fFPDgge/flaxseed_flower_pictures.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/dgh47gj/smashbox_makeup_brushes.pdfIn PDF document text
    • https://cdn.sqhk.co/kobewudojuvo/ia1gfb7/tovefatizitisodufize.pdfIn PDF document text
    • http://sevagawos.getenjoyment.net/99324699559.pdfIn PDF document text
    • https://rufeguduti.weebly.com/uploads/1/3/1/3/131384240/wafexus_rubogorup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479718/normal_5fda39a287922.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482190/normal_604bc8c4b3699.pdfIn PDF document text
    • http://fekevopimibun.sportsontheweb.net/2540637382.pdfIn PDF document text
    • https://dorikorojuj.weebly.com/uploads/1/3/3/9/133987202/4065083.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wilazetifoka.epizy.com/97756637193.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dd4d480-0852-4746-96f6-f2199fd95272/57503438352.pdfIn PDF document text
    • http://potovoz.rf.gd/ranupeganum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3022e69f-4426-4150-bbc5-6be2abdec072/tabela_de_consumo_de_energia_eletrica_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9bd8c3f-98d3-4282-9506-41dc5c10a25d/gesera.pdfIn PDF document text
    • http://zatuvejamubolo.atwebpages.com/agamemnon_by_aeschylus_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81f3c2f6-5678-4268-83a0-02cc614f3599/small_appliance_repair_service_near_me.pdfIn PDF document text
    • http://pinixivula.epizy.com/samsung_galaxy_s5_screen_not_working.pdfIn PDF document text
    • http://fojakosi.atwebpages.com/nixon_player_watch_white.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_off0000f22a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22A 5032 bytes
SHA-256: d971c55efd9551e4c3c3641c251791761625c5d1d78cba0df8fb9f6d99dac779
font_01_sfnt_off00010342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10342 13456 bytes
SHA-256: 211de398c36b0b1f2be92a073c3b173812d0ae98c5d69e0b529032e0c8c03891