Malicious PDF — malware analysis report

Static analysis result for SHA-256 193920a1f008dc4b…

MALICIOUS

PDF

71.9 KB Created: 2021-04-05 01:52:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ce7595788a1502ecf11446692a0a6421 SHA-1: cd7557e23961c5d032dd48d91ef28b1eccaccc36 SHA-256: 193920a1f008dc4b1f3be3d8bde5ef0ce5c5a1454b3286b1a3c2fc2541831b8e
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a high heuristic score indicating it's a link farm on disposable hosting. The document body, though partially garbled, includes text related to 'Comentario biblico macarthur antiguo testamento pdf' and references wkhtmltopdf, suggesting a lure to disguise malicious links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution via the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://golowaki.ru/strik?utm_term=comentario+biblico+macarthur+antiguo+testamento+pdf PDF link annotation
    • https://jasudelile.weebly.com/uploads/1/3/4/0/134012727/4406296.pdfIn PDF document text
    • http://shoop-fn.ru/pacific_volkswagen_service_department3zh4z.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/shbjbbU/money_express_check_cashing_trenton_nj.pdfIn PDF document text
    • http://adv-workshop.site/how_to_get_money_in_gta_5_story_mode_cheat_ps47xz0z.pdfIn PDF document text
    • http://megazoni.iblogger.org/cypress_snow_report.pdfIn PDF document text
    • https://cdn.sqhk.co/xujurovemu/ha0igjb/feudalism_in_japan_pyramid.pdfIn PDF document text
    • https://rawoxozuk.weebly.com/uploads/1/3/2/6/132695352/xejawira.pdfIn PDF document text
    • http://portkamesto.site/daewoo_eco_microwave_manualcepzu.pdfIn PDF document text
    • http://tepuragebu.iblogger.org/free_printable_analog_clock_template.pdfIn PDF document text
    • https://pefizisiguxuv.weebly.com/uploads/1/3/1/4/131438819/12929ec6369e.pdfIn PDF document text
    • https://pawuzoratifeze.weebly.com/uploads/1/3/4/4/134471058/dajefijavoxi.pdfIn PDF document text
    • http://creamwalls.space/oxford_modern_english_grammarh0z1e.pdfIn PDF document text
    • https://fejegexe.weebly.com/uploads/1/3/4/6/134617501/71048adcde24.pdfIn PDF document text
    • http://ecosbor.net/evening_shift_jobs_hiring_near_meu4w3d.pdfIn PDF document text
    • https://cdn.sqhk.co/nivepudokoto/vgfmghq/pifugu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gumomexad.onlinewebshop.net/sepubuw.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/2011_dodge_avenger_express_for_sale.pdfIn PDF document text
    • http://vawirir.atwebpages.com/unit_forces_law_of_universal_gravitation_worksheet_answer_key.pdfIn PDF document text
    • http://zebinagapovu.epizy.com/uc_browser_apk_full_version_pc.pdfIn PDF document text
    • http://karokifewugasuz.onlinewebshop.net/como_funciona_el_cerebro_libro.pdfIn PDF document text
    • http://welegovejebiwun.epizy.com/naomi_in_the_living_room_monologue.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/articles_worksheets_for_grade_3.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/slope_stability_analysis_excel_sheet.pdfIn PDF document text
    • http://kulebosux.myartsonline.com/4504541022.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_off0000d93d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD93D 5612 bytes
SHA-256: dfd48e251ad2a576b1c84957fbe376141103d83a96fdcbb152432447798b6e80
font_01_sfnt_off0000ec1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1D 10912 bytes
SHA-256: 5b0d8c505faa266331bc3a46add02edc0fdd7f0fd9b0e4c7d50eef19f5cffaa5