Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6b847c05059a669…

MALICIOUS

PDF

79.4 KB Created: 2021-03-14 01:36:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 720c2517e84717cadce753cf1e18b5fc SHA-1: 38d8a6bf18facba98db65b714a7f703ff3e6e700 SHA-256: b6b847c05059a66978189c2fcf292ae414d705dc5b0fbecbd6db2a2651898077
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://gimoguvi.ru/strik?utm_term=what+will+after+we+collided+be+streaming+on PDF link annotation
    • https://cdn.sqhk.co/wobimore/hhhdhbK/bisijodilikavag.pdfIn PDF document text
    • http://xarapover.mygamesonline.org/epson_wf_2530_head_alignment.pdfIn PDF document text
    • http://xelasurugopu.mywebcommunity.org/wozorunevitixedovigu.pdfIn PDF document text
    • http://beririka.scienceontheweb.net/mowinobewojatowu.pdfIn PDF document text
    • https://cdn.sqhk.co/walamalesumi/jciaib0/music_rhythm_master_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453332/normal_603eceb2d1eb8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465133/normal_5ff4a242c4577.pdfIn PDF document text
    • https://cdn.sqhk.co/nunamarajop/Kjbxhcm/97176030461.pdfIn PDF document text
    • https://cdn.sqhk.co/komagiju/c4IvRjd/best_color_splash_app_for_android_2019.pdfIn PDF document text
    • https://xabisipejerifo.weebly.com/uploads/1/3/4/6/134634854/lukumunifakifew.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/ghpkF7z/47581702450.pdfIn PDF document text
    • https://cdn.sqhk.co/mojesoje/rjaviaV/piriv.pdfIn PDF document text
    • https://cdn.sqhk.co/pixorikibam/aX4Zib6/battalion_force_tactical_rpgs.pdfIn PDF document text
    • https://dalujukonuxuda.weebly.com/uploads/1/3/1/1/131163933/dbebb5aa3.pdfIn PDF document text
    • https://gedotelebuguda.weebly.com/uploads/1/3/6/0/136050260/6079892.pdfIn PDF document text
    • https://wepebajaka.weebly.com/uploads/1/3/4/5/134588919/kowipifopijujol_mowaluposoguk.pdfIn PDF document text
    • http://vowufijetapiko.sportsontheweb.net/al_quran_learning_software_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471706/normal_6045ff61e91d9.pdfIn PDF document text
    • https://cdn.sqhk.co/puvelumilum/jeqSjbY/valexikawadetove.pdfIn PDF document text
    • https://cdn.sqhk.co/bupabumo/1rgidjg/chain_reaction_versace_shoes.pdfIn PDF document text
    • https://sefomaxezaniv.weebly.com/uploads/1/3/1/4/131483109/jasezafetuxiru_vodemutina_saziwefakarap_gizajukigavuriz.pdfIn PDF document text
    • https://cdn.sqhk.co/turaxulefa/4c4oihg/first_war_of_independence_1857-_causes_and_consequences.pdfIn PDF document text
    • https://cdn.sqhk.co/nilamemiw/jt3ieYN/motor_world_car_factory_beginners_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388060/normal_5fd6e293ed9ac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jonesojawu.myartsonline.com/python_data_analysis_projects.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_off0000f4a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A4 5680 bytes
SHA-256: 8880ecbf39691b2fea8c187405310c9f7277951b8bab6be71cc5f8b8c30ec231
font_01_sfnt_off000107e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E0 11076 bytes
SHA-256: 975788894ab5b4553e54161f46f636c432a47aba1032f9fe61edde00fe3514c6