Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7a59781d1a6ae08…

MALICIOUS

PDF

76.8 KB Created: 2021-03-22 02:58:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: d159b59207b44f924b3dcf43143c73b8 SHA-1: 67c1ae17ccb55fa182fef73ab575352c1f3bf955 SHA-256: b7a59781d1a6ae08188441094d12f9fa34d7f9d4025b03186f731ee675224401
166 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document body and numerous extracted URLs suggest a link farm designed to redirect users to potentially malicious sites, indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic. The presence of 'cmd_command_list' in the document body hints at potential command execution, though no specific script was extracted.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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=how+to+clean+arctic+king+portable+air+conditioner PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450418/normal_5fdb39d3c5cf5.pdfIn PDF document text
    • http://lifeshop.pro/the_best_christmas_pageant_ever_freexrqjj.pdfIn PDF document text
    • http://f13x.xyz/what_kind_of_oil_does_a_2005_dodge_stratus_takenwndj.pdfIn PDF document text
    • http://graatorama.space/srs_airbag_light_reseth1zbs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420930/normal_6005da9b681e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408462/normal_60333651b7cad.pdfIn PDF document text
    • http://moneymaya.site/air_force_academy_football_coaches_historynnvo5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408702/normal_6043ddc1e73fb.pdfIn PDF document text
    • http://how2clever.com/gurorexofebitadepipijekij1861.pdfIn PDF document text
    • http://kupiokno.su/windows_7_cmd_command_listfek09.pdfIn PDF document text
    • http://kind-insta.site/psicologia_educativa_de_david_ausubew4e8n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369507/normal_60265ffd0de2d.pdfIn macro / runtime command snippet
    • http://goladelexugezi.sportsontheweb.net/vonapuzamiz.pdfIn macro / runtime command snippet
    • http://shopbest.online/water_heater_pilot_not_turning_onlox5j.pdfIn PDF document text
    • http://chambre.xyz/xejugitatapoziriwopj80ab.pdfIn PDF document text
    • http://dom-bita.org/what_is_the_weight_limit_on_a_delta_bassinet549i1.pdfIn PDF document text
    • http://bluhgang.best/kobewenuwegawusuojmui.pdfIn PDF document text
    • http://kind-insta.site/psicologia_In macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sopexalibip.onlinewebshop.net/fijotukagutugenapuro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cb54b77-d77e-4fda-9b60-08d96033bb1a/36926799641.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e28d129-499e-466e-b2d6-16605c6480ec/how_do_you_reset_an_ao_smith_water_heater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1c9f457-4d39-4988-ae0b-9c28d8220189/sexuzep.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_off0000ee6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6A 5320 bytes
SHA-256: 0be6f73ff941ece6dae9f893ab24ad525743bf703423c09cdc677d6734119238
font_01_sfnt_off0001009a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009A 10888 bytes
SHA-256: 8f794e9e34b726b01d0f033094c06a2de3b12d70f812f73605d9a081128daf65