Malicious PDF — malware analysis report

Static analysis result for SHA-256 618bfabef40718b0…

MALICIOUS

PDF

73.6 KB Created: 2021-02-26 03:55:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 026723b92598d5657508adc134718142 SHA-1: dbbbaabfa7c658865afcdd36a0a35ce67a54f92f SHA-256: 618bfabef40718b070b85c7012900313a3205149472df5ec7e2c4a0960003031
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links pointing to various domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to exploit users through deceptive links.

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://seumenha.ru/123?utm_term=hp+laserjet+p2035+toner+change PDF link annotation
    • http://vubitim.sportsontheweb.net/how_much_is_a_2015_chevy_silverado_worth.pdfIn PDF document text
    • http://medebupima.sportsontheweb.net/los_5_lenguajes_del_amor_test_para_esposas.pdfIn PDF document text
    • http://vagijuderotogur.22web.org/business_communication_now_locker_findlay.pdfIn PDF document text
    • http://gojawufeki.getenjoyment.net/8918742325.pdfIn PDF document text
    • https://cdn.sqhk.co/kesusevuzep/gjyijji/shadowverse_ccg_characters.pdfIn PDF document text
    • http://manuximaxemeje.scienceontheweb.net/illuminated_manuscript_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/xegunorasu/c8haMii/train_and_rail_yard_simulator_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/norumuwapa/egihcje/jefubotaru.pdfIn PDF document text
    • https://cdn.sqhk.co/vavewiren/pZbhgeL/95371593840.pdfIn PDF document text
    • http://zexaribamemavi.sportsontheweb.net/zokaxubopajegorofurujis.pdfIn PDF document text
    • https://cdn.sqhk.co/terasovo/IXyhjy2/traffic_tour_unblocked.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://guxodolabisiruj.epizy.com/lefubadadugiwalijavi.pdfIn PDF document text
    • http://ralupuwegilad.rf.gd/52612664559.pdfIn PDF document text
    • http://vizawog.epizy.com/17862769507.pdfIn PDF document text
    • http://zijiwaras.onlinewebshop.net/big_data_analytics_tools_examples.pdfIn PDF document text
    • http://mutodavop.rf.gd/domogizejunibikuzib.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_off0000e215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE215 5792 bytes
SHA-256: de894b26cdd6eb853300978f1224633cb63a921a58233792b245b6557335d9ea
font_01_sfnt_off0000f5cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CB 10496 bytes
SHA-256: 6941ebc7e31caba563bbc6981ec061f3029ab68d9526379f3f1395a134ba9477

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