Malicious PDF — malware analysis report

Static analysis result for SHA-256 966fa4e7e58b2959…

MALICIOUS

PDF

75.5 KB Created: 2021-03-01 09:20:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 650601f9c566c7bebea0f6c27f9ec7eb SHA-1: 2b3f1ab5493c0675fdc8650af05e64489718f56d SHA-256: 966fa4e7e58b2959b3075725d968961a2679d52fd304d4a82b53fdd573e2faba
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs pointing to link farms and other PDF files, indicating a likely SEO manipulation or content distribution scheme. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically identifies the sample as a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://druttle.ru/wix?keyword=ps4+gift+card+generator+no+survey PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427300/normal_6019ac803da57.pdfIn PDF document text
    • http://sinoxaju.mygamesonline.org/jirir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462368/normal_6007255794257.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443610/normal_6013b951f1bc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469836/normal_5fd133b99da53.pdfIn PDF document text
    • https://cdn.sqhk.co/nanijamu/xkkYggb/xofegulasabebexudavaroxax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377113/normal_5ffe87e4eb8eb.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/bagifojowemapa.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/R7kf4hd/boxelex.pdfIn PDF document text
    • https://cdn.sqhk.co/namemedoxake/0dSrgdK/gry_online_ball_hero_adventure_red_bounce_ball.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/VSgc80H/i_remember_mama_shirley_caesar_instrumental.pdfIn PDF document text
    • https://cdn.sqhk.co/geruvijiwiw/fkhjMDX/hover-_1_eclipse_manual.pdfIn PDF document text
    • http://vofufime.mypressonline.com/vefotiguditixowafikatel.pdfIn PDF document text
    • http://rasidafepu.mypressonline.com/baxezefeguxi.pdfIn PDF document text
    • http://nurokojo.mypressonline.com/how_to_fix_a_water_cooler_that_doesnt_cool.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xowilewegiwo.myartsonline.com/oedipus_rex_character_analysis_essay.pdfIn PDF document text
    • http://geforagegi.atwebpages.com/23383778609.pdfIn PDF document text
    • http://sazasewugekupej.onlinewebshop.net/mushoku_tensei_wiki_rudeus.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_off0000e948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE948 5408 bytes
SHA-256: f619ac75a352ce89d024c3136f20f00fbec1bc7fbab1f4cfe8321436e573dcc3
font_01_sfnt_off0000fbd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD8 10704 bytes
SHA-256: ac8c9a264f02251e96de3ea4d9bf8a201bf99f7c6d60878d1a94179963853b71

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