Malicious PDF — malware analysis report

Static analysis result for SHA-256 c971dd6876f21274…

MALICIOUS

PDF

74.5 KB Created: 2021-02-14 22:28:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7fbcf961c6e15b16705f878a450f4ba2 SHA-1: 0720d93f28ce34e01cfc69aab95339987974755d SHA-256: c971dd6876f2127447b2994ada149a4f2a54d862a5dc3441d6d9c972d1bd2de3
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://bologen.ru/aws?utm_term=appletree+answers+dream+on PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454977/normal_5ff6632350dcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378856/normal_6023d79addb9c.pdfIn PDF document text
    • https://gisunotagalaros.weebly.com/uploads/1/3/2/3/132303086/335d5d8ae7.pdfIn PDF document text
    • https://cdn.sqhk.co/nuponoviva/fMjdjjP/numifaguzim.pdfIn PDF document text
    • https://cdn.sqhk.co/sinupupuzaxa/uZLgjhj/dinosaur_game_deadly_dinosaur_hunter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486971/normal_5fd9a78a43b8b.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/ifPXfC4/tasimiwetolisodukitoxege.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485448/normal_5ff2726425e6d.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/fiCJjgj/best_healthy_ninja_foodi_recipes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367278/normal_5ffb0dce520f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417327/normal_601b27565da8c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xivefasojag.epizy.com/bodybuilding_hd_wallpapers_1920x1080.pdfIn PDF document text
    • http://xizoxenefodage.epizy.com/73616656897.pdfIn PDF document text
    • http://depebovibu.epizy.com/cardinal_pole_uniform.pdfIn PDF document text
    • http://mudoxaw.epizy.com/s_resident_evil_4_ppsspp_zone.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_off0000e75f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75F 5188 bytes
SHA-256: f8e5e2ed5f3235009a0a56345371f9fe76e2eceadf4af686ca5202c908738a13
font_01_sfnt_off0000f8f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F9 10700 bytes
SHA-256: 0079e1882598bcc57f27ad18ad83fde3fcf619250ef4dc73a4e04ac13acc2491

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