Malicious PDF — malware analysis report

Static analysis result for SHA-256 f98f094cca5e4855…

MALICIOUS

PDF

73.2 KB Created: 2021-02-08 19:55:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d2bef53bb67bcccae2c2179f84988e20 SHA-1: 0784512db07a2e76ca82626fef4d21ee5941f159 SHA-256: f98f094cca5e485559891180cf9ecbc56fb6d3dedf45008fd63af9206f0b0d12
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The document body, though heavily obfuscated, contains references to 'slot machine games unblocked' and appears to be generated by wkhtmltopdf, a tool often used to create SEO spam or phishing pages.

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.
  • 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://jacksth.ru/123?utm_term=slot+machine+games+unblocked PDF link annotation
    • https://repugololenip.weebly.com/uploads/1/3/4/8/134880500/fokudugese.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368756/normal_5feb98b30a7a9.pdfIn PDF document text
    • https://gabubogoko.weebly.com/uploads/1/3/3/9/133997439/2526848.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425224/normal_601b9a8145362.pdfIn PDF document text
    • https://cdn.sqhk.co/jedepazisu/hvhcia0/81077790407.pdfIn PDF document text
    • https://fosegeluka.weebly.com/uploads/1/3/4/7/134717840/4581137.pdfIn PDF document text
    • http://libralab.digital/ice_sheet_definition_environmental_sciencecnhkw.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/0ijhgqB/snes_classic_hack_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464539/normal_5fd13ab224e4c.pdfIn PDF document text
    • http://prizinsta.site/the_solar_system_song_aj_jenkins_lyrics3znmh.pdfIn PDF document text
    • http://girlsbeach.space/world_war_z_best_zombie_movies79gp9.pdfIn PDF document text
    • http://jaraxusej.iblogger.org/archicad_15_tutorial_free.pdfIn PDF document text
    • https://pudorexejuvaw.weebly.com/uploads/1/3/1/4/131455832/63e443.pdfIn PDF document text
    • https://dukowitemodilel.weebly.com/uploads/1/3/5/3/135316140/nizifujulepem.pdfIn PDF document text
    • https://xuvuvigaxopezut.weebly.com/uploads/1/3/4/7/134721928/9916463.pdfIn PDF document text
    • https://cdn.sqhk.co/bexutavukaro/jfcAsks/68283654344.pdfIn PDF document text
    • https://gubulugovidenu.weebly.com/uploads/1/3/1/4/131406252/gamimewabizekoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e21f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21F 5564 bytes
SHA-256: 3f634d9c763d2fffec09263af2004a07bd6c27593719ca495cd015e7ec0c710a
font_01_sfnt_off0000f4e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E1 10208 bytes
SHA-256: 4ae2836fb9d576875757f9d8b81282cd16f7394b4c7b44003534e3edacc1e4a1

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