Malicious PDF — malware analysis report

Static analysis result for SHA-256 0162e3d71783e433…

MALICIOUS

PDF

83.9 KB Created: 2021-04-05 17:53:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e89f4f267a3d6deaa01491422a3d56f8 SHA-1: 9ff5dc8c254ccb362d28ae4e510a81bf922abd52 SHA-256: 0162e3d71783e433ac37202efca2533eb17f6088af5a6effac82be0092ba80d0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=fudge+a+mania+book+study PDF link annotation
    • http://degakak.sportsontheweb.net/gopalapiriwakafedunuvafaj.pdfIn PDF document text
    • http://coins24h.com/652571314wtmqw.pdfIn PDF document text
    • http://xasumemazekejo.scienceontheweb.net/abnormal_pap_spanish.pdfIn PDF document text
    • https://woxopipuwesubaj.weebly.com/uploads/1/3/1/4/131453061/wutudilovun.pdfIn PDF document text
    • https://rowagikej.weebly.com/uploads/1/3/4/6/134678960/nedejo_finetesegedus.pdfIn PDF document text
    • http://ecoservice-vlad.ru/script_writing_templatey7qgh.pdfIn PDF document text
    • http://kefets.xyz/wagner_wood_and_metal_paint_sprayer_w100_-_280w_reviewszjoik.pdfIn PDF document text
    • http://miwodenexiz.iblogger.org/mpsc_mains_2016_gs_2_answer_key.pdfIn PDF document text
    • https://betebawaxudu.weebly.com/uploads/1/3/5/3/135388356/4af86bc045722.pdfIn PDF document text
    • http://mixed-rootwork.com/82915159051dtwgz.pdfIn PDF document text
    • http://snegny.com/how_to_use_firefly_vaporizervu03x.pdfIn PDF document text
    • http://cabinetshub.xyz/2010_camaro_ss_rims_and_tires_for_salef6ajz.pdfIn PDF document text
    • https://cdn.sqhk.co/letijefa/2uigCOA/best_dual_monitor_setup_for_macbook_pro.pdfIn PDF document text
    • https://cdn.sqhk.co/bulixanejad/kcQUcih/gluten_free_crepe_recipe_with_almond_flour.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ziwatepubapusu.rf.gd/50710024009.pdfIn PDF document text
    • http://fasevebozumip.rf.gd/gmat_official_guide_ebook_free_download.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_off00010b15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B15 5280 bytes
SHA-256: 8784d00a657d91f6e27097d28594ffef6576cb7258bb45241365afb040e41036
font_01_sfnt_off00011d08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D08 11128 bytes
SHA-256: 4e7ce6cf05f5e479f75dcc4e545bfd961a06c7933d43c59481b6bd7f72210b35