Malicious PDF — malware analysis report

Static analysis result for SHA-256 4259c5e837a7305a…

MALICIOUS

PDF

82.3 KB Created: 2020-12-31 18:36:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-16
MD5: f8f48ecb292ced527686c61d5afd21a4 SHA-1: ac58550c2d26cce2a528b9fbbb9e92085f9ed9da SHA-256: 4259c5e837a7305abb30f33768a0075f458097a74af5ce0c644686bca67a7ced
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafffi.ru/123?utm_term=largest+cities+in+australia+2020 PDF link annotation
    • https://dumidonawusirug.weebly.com/uploads/1/3/5/3/135306770/7399436.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427498/normal_5fa0e37fea2ab.pdfIn PDF document text
    • https://renesixedobalew.weebly.com/uploads/1/3/0/9/130969137/baxozisofis_jimojakiwa_muxepimima.pdfIn PDF document text
    • https://cdn.sqhk.co/pofifarim/hjmheeX/18575460499.pdfIn PDF document text
    • https://vijipivefewari.weebly.com/uploads/1/3/4/6/134624644/vajal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450746/normal_5fa3a866a5bc2.pdfIn PDF document text
    • https://cdn.sqhk.co/regavebike/jjmvrJs/noblemen_1896_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/jalafimimodo/jbu9Chi/nigemepeloromub.pdfIn PDF document text
    • https://fiwisiroveton.weebly.com/uploads/1/3/4/3/134339953/nomeraruzuraf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/383c5deb-a928-478b-a6c4-52c814f792a1/zumidekiti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bbe6a4c-74f7-4d54-a157-ccc8a79689b9/zesoditiliso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3b7bdd3-9f96-4e62-92cf-2e041598f95c/girl_guide_badges_iron_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4172969d-a5d7-4eec-99c1-fcc1875d7fe8/human_pedigree_analysis_problem_sheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1b29974-f0ac-4bab-96c3-83791b0afe0d/philosophy_and_education_an_introduc.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_off000105d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D3 5184 bytes
SHA-256: cd4023c7fbe571d771b30f4dc62b1fd1d649fd6439408c83da393fdc458ec93a
font_01_sfnt_off00011787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11787 10784 bytes
SHA-256: 8f75afde34bc05d5505ef7564bcdbfcac7d433f0bd1b568af5be461f49cfec23

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