Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a90ccbc9dbba237…

MALICIOUS

PDF

81.7 KB Created: 2021-04-21 09:13:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f82cb1d9ab128b9c84f2e17079082a4b SHA-1: 5ee5cafc2512d78eef243c3f04df252c96f142c2 SHA-256: 3a90ccbc9dbba237e7f6a3254f55614394e9ad82d07cf8a2dc1cf139e9f8a4d8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm, and the ClamAV detection confirms its malicious nature. While no scripts were explicitly extracted, the presence of many external links suggests the PDF's primary function is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/strik?utm_term=financial+due+diligence+checklist+kpmg PDF link annotation
    • http://bigijawiv.scienceontheweb.net/how_can_you_tell_how_old_a_hot_water_heater_is.pdfIn PDF document text
    • https://diwekapuxejube.weebly.com/uploads/1/3/1/4/131455019/2339178.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420018/normal_5fd9e2377765f.pdfIn PDF document text
    • https://cdn.sqhk.co/kutogudofi/fRyijhf/tevabejanojomomejo.pdfIn PDF document text
    • http://interstart.online/vazefizagibupodukeo872u.pdfIn PDF document text
    • http://vodoroding.info/lutusijumirlnke5.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/71290228907.pdfIn PDF document text
    • https://vigegenatiborig.weebly.com/uploads/1/3/0/7/130740049/6258225.pdfIn PDF document text
    • http://hdsamara.ru/zejazuroropoluzormq1f.pdfIn PDF document text
    • https://wiguvizokon.weebly.com/uploads/1/3/0/7/130776253/dusefejija-nuzaxet-teketokibu.pdfIn PDF document text
    • https://cdn.sqhk.co/gadewekunel/0Thc4ij/bapenev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494432/normal_603ff65482a7e.pdfIn PDF document text
    • http://towexiwi.sportsontheweb.net/the_phantom_of_the_opera_oxford_bookworms_stage_1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410956/normal_6032d5aa7a052.pdfIn PDF document text
    • https://cdn.sqhk.co/tosijoxopum/iijaijf/37168817110.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nojikigor.myartsonline.com/a_song_of_ice_and_fire_book_4_read_online.pdfIn PDF document text
    • http://rosevasejila.myartsonline.com/96393443278.pdfIn PDF document text
    • http://fatapiwav.rf.gd/hundreds_tens_and_units_worksheets_year_3.pdfIn PDF document text
    • http://razafif.epizy.com/oxford_dictionary_and_thesaurus.pdfIn PDF document text
    • http://napalujimawoz.rf.gd/marina_abramovic_book.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_off0000f23d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23D 3212 bytes
SHA-256: 3136bd705179b7b524518c34a2bf3ad8905952ed488fed46c897c3c991964c86
font_01_sfnt_off0000fdbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBE 5412 bytes
SHA-256: a6882bce1ed861f819c4e90e478e8ec8bb7e5f665846e55bff7d327f62a2afdb
font_02_sfnt_off00011004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11004 12076 bytes
SHA-256: 397bbc674b1797bee505c0881b6c093df449fd412dfba56015d92550fa39c9e0