Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff26943d74158b55…

MALICIOUS

PDF

79.5 KB Created: 2021-02-18 02:26:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: c6e612d2920acfcc4fc3013fcf4390a9 SHA-1: cab407ec2f86f9cd40c828463dc51bee769da111 SHA-256: ff26943d74158b5526e1cfa597247a04655aaa1e83937290fa4ce2ebb173694a
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, with one specifically flagged as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a URL that appears to be a redirector, further supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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/strik?utm_term=the+one+elton+john+song+lyrics PDF link annotation
    • https://cdn.sqhk.co/leporolino/okWjdhf/loxotirom.pdfIn PDF document text
    • https://cdn.sqhk.co/wupetutigo/wpWUaia/download_game_fun_race_3d_mod_apk_terbaru.pdfIn PDF document text
    • http://kolejuf.iblogger.org/badshah_movie_songs_masstamilan.pdfIn PDF document text
    • http://pirawamajakemiv.22web.org/79032749007.pdfIn PDF document text
    • http://jojalipubawil.22web.org/french_grammar_exercises_worksheets.pdfIn PDF document text
    • https://wutuzorul.weebly.com/uploads/1/3/5/9/135963099/nalawowomininep-fapawurago-xakulipovet.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://kabemetuva.rf.gd/63851039460.pdfIn PDF document text
    • http://fakeloj.rf.gd/school_things_worksheet_for_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/bootstrap_theme_registration_form.pdfIn PDF document text
    • http://kusogit.rf.gd/calendario_2020_argentina_para_imprimir.pdfIn PDF document text
    • http://tinipolevuzow.epizy.com/business_plan_template_landscaping_company.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/dave_chappelle_show_season_1_free.pdfIn PDF document text
    • http://mamotupot.rf.gd/maths_worksheets_ks2_money_problems.pdfIn PDF document text
    • http://didabatok.epizy.com/58376836719.pdfIn PDF document text
    • http://rezafenunuritem.epizy.com/93764156333.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/discord_server_advertising_template.pdfIn PDF document text
    • http://jovukanuwu.rf.gd/tumixukapiru.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF228 4768 bytes
SHA-256: a273fb119948fd32b465c8229ab1659c7133da963c3bfd0178367f87c0270428
font_01_sfnt_off0001025b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025B 9440 bytes
SHA-256: 2837588cd8758e9242ba4c57b5bc385dc6da953c73ea2ef678baad779082167c
font_02_sfnt_off0001229a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1229A 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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