Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5f9d6fa650d8993…

MALICIOUS

PDF

84.3 KB Created: 2021-03-20 22:06:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 69a41c349bd9fd1a4bf24e3ac64f7a15 SHA-1: 4ad7e35f40ca17f0dbc37d141a60ddc243bfa100 SHA-256: e5f9d6fa650d8993819c252a3f30d250c1c712546cd43b3a7f271aefcd027098
146 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting a tactic to distribute malicious links or engage in SEO poisoning. The document body, though heavily obfuscated, contains references to wkhtmltopdf and a date, but no clear user-facing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://leonvi.ru/wix?keyword=rotorazer+2020+blades PDF link annotation
    • https://cdn.sqhk.co/nimabugokofa/imiicY1/lanedofesege.pdfIn PDF document text
    • http://refazali.mygamesonline.org/matewiselajeso.pdfIn PDF document text
    • https://cdn.sqhk.co/nugopanage/d7KsAhg/north_star_high_school_staff.pdfIn PDF document text
    • http://jolijivik.scienceontheweb.net/buzedinuzorasetesizotu.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/behringer_x32_producer_owners_manual.pdfIn PDF document text
    • http://javaxirivibewi.mygamesonline.org/14393366650.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/hcxhhjb/getijovememuvutewojevin.pdfIn PDF document text
    • http://joxezorov.mywebcommunity.org/bula_alprazolam_1mg.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/mtb_cycle_games.pdfIn PDF document text
    • https://cdn.sqhk.co/gatezoru/fgcjjxj/scanner_diagnostico_automotivo_elm327_obd2_bluetooth_mini_azul.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/lee_county_florida_school_schedule.pdfIn PDF document text
    • http://tojuvapemupo.mywebcommunity.org/inheritance_paolini_review.pdfIn PDF document text
    • http://toluvubub.mygamesonline.org/analgsicos_opioides.pdfIn PDF document text
    • http://sefesipodaj.22web.org/pegefumovu.pdfIn PDF document text
    • http://dorulezebum.sportsontheweb.net/66086853787.pdfIn PDF document text
    • http://duwinijuj.mypressonline.com/gudumazimezup.pdfIn PDF document text
    • http://bikejesoxatelo.mygamesonline.org/jandy_3_way_pool_valve_parts.pdfIn PDF document text
    • http://nakodinita.scienceontheweb.net/tlcharger_bescherelle_exercices_et_dictes_gratuit.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/fire_emergency_drill_report.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rimuvuvipimube.epizy.com/toronto_alexithymia_scale_tas-_20.pdfIn PDF document text
    • http://keregimuw.onlinewebshop.net/estudios_biblicos_para_jovenes_cristianos_bautistas.pdfIn PDF document text
    • http://vamavaremimot.atwebpages.com/jenn_air_double_wall_oven_installation_manual.pdfIn PDF document text
    • http://bawokexumavi.epizy.com/how_to_fix_a_leaking_washing_machine_hose.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_off00010b13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B13 5288 bytes
SHA-256: b41f2b6cf2fd8f7c1e3b91d9e4a84208a265845d3ed11f79d0b3c120ba388a92
font_01_sfnt_off00011d19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D19 11552 bytes
SHA-256: 8db4ac5bc9e2628b9785abfde1015e72248c2139117ddff0f0332f3ba19aae3d