Malicious PDF — malware analysis report

Static analysis result for SHA-256 77d9eee3bce845e2…

MALICIOUS

PDF

82.9 KB Created: 2021-03-21 09:19:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e59ad315676b351c25e52504bea9a985 SHA-1: d0dd860f73630ab4dc92c0d26ef8ea4cb7a464b3 SHA-256: 77d9eee3bce845e2381c7e19f84280433d244f0b6bbc4aca7b6e7d61c1d0eafc
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous external URLs that point to other PDF documents, likely to manipulate search engine results or lure users to malicious content. The presence of many external links on disposable hosting further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 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://zajinet.ru/award?keyword=pdf+bestand+comprimeren+mac PDF link annotation
    • https://cdn.sqhk.co/bujasugawo/b5bIJOy/us_armed_forces_enlisted_rank_insignia.pdfIn PDF document text
    • https://cdn.sqhk.co/kasuvapexal/qChgjjj/medetawalofufetagojokigu.pdfIn PDF document text
    • http://kovuzaxaf.medianewsonline.com/red_rising_series_characters.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393346/normal_603a73e61a002.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454048/normal_6039cb85b7a1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476268/normal_60243a946d140.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424683/normal_605550397abce.pdfIn PDF document text
    • http://fevinoreniwelik.sportsontheweb.net/funivo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425483/normal_5fc71898b4af7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416490/normal_5fdf73b62a7be.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzemokobexo/jjVghi1/jiwoxepagasavikeveritotu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475864/normal_5fca2ee44b225.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379856/normal_60445c074329f.pdfIn PDF document text
    • http://tojuvapemupo.mywebcommunity.org/96130084120.pdfIn PDF document text
    • https://cdn.sqhk.co/vonirosidejo/Njgwjj6/of_road_games.pdfIn PDF document text
    • http://mezogevap.mypressonline.com/zaromebapogopos.pdfIn PDF document text
    • https://cdn.sqhk.co/mitebosareki/cjeXK2H/bakogosikexixoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408989/normal_602c3566558b4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pusebirenox.myartsonline.com/40270636384.pdfIn PDF document text
    • https://9de673a2-3b8e-40eb-bbf5-c0ad8e71a3da.filesusr.com/ugd/bd5c68_72b0b959f8e54b4383d1fbbc14d28864.pdf?index=trueIn PDF document text
    • https://a0758896-f8c2-4fc9-8c7e-5c1738e8bc18.filesusr.com/ugd/0ce882_4a64e34f212a4b69b8e7cc6f4cb7c9a8.pdf?index=trueIn PDF document text
    • https://1b2c4efd-c8eb-4b04-b26f-b9154d704720.filesusr.com/ugd/d3758e_f4548378946a49f28f794da1b8d825d9.pdf?index=trueIn PDF document text
    • https://9c789f27-b70c-4c9d-9e83-211ee8f99b38.filesusr.com/ugd/bdeb4c_87f138e3887c4188b0da58f06476fdfd.pdf?index=trueIn PDF document text
    • https://42190e62-4dca-482d-a077-ae7b222d7779.filesusr.com/ugd/b91392_6bcd017912e34749a47ea448ee104010.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FA 5196 bytes
SHA-256: e65fe29bbb0480d11ac9c4614ed1edb7bd77fc01e924562a5fd7020211059226
font_01_sfnt_off00010a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A74 11132 bytes
SHA-256: 22178591acbade4391ba0c1b8530781e7656cb3fa5d47231657cfa72f8347b4b
font_02_sfnt_off00012ffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FFE 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f