Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc7c924f92cd4221…

MALICIOUS

PDF

89.9 KB Created: 2021-03-24 21:46:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: d29bda64daa00a76dc67fcf0988994e3 SHA-1: c074fb6227e457045226700e4a265001481417f4 SHA-256: dc7c924f92cd42214d6bb559b27e4fb94ac37b6c0d45f07fd22b331b2358afaa
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, likely as part of a spearphishing campaign.

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://botokaw.ru/award?keyword=degradacion+ambiental+en+colombia+pdf PDF link annotation
    • https://gejosubirimo.weebly.com/uploads/1/3/0/7/130776575/butaxofawole.pdfIn PDF document text
    • http://winnerslm.space/4577998228638sw7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375705/normal_604307ac95252.pdfIn PDF document text
    • http://nudevego.iblogger.org/repokuz.pdfIn PDF document text
    • https://cdn.sqhk.co/dewozoju/tSrgdjb/xemonosawawizuvat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457838/normal_5fd6682cbff95.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366022/normal_5feb7f1095644.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496374/normal_604ed27ebfea0.pdfIn PDF document text
    • http://astrology-personal.online/sales_forecast_report_meaning7tqca.pdfIn PDF document text
    • https://julureka.weebly.com/uploads/1/3/5/9/135957187/zobenegep.pdfIn PDF document text
    • https://sevokubataper.weebly.com/uploads/1/3/0/8/130814346/gadag-xuxejerozanak-nifufetuvileluz.pdfIn PDF document text
    • http://cardioactiveitalia.site/2008_jeep_wrangler_unlimited_x_oil_typewxwxh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368750/normal_604bb5f1b1a06.pdfIn PDF document text
    • https://cdn.sqhk.co/kataduzoni/wGwKge9/food_truck_driver_cafe_truck_driving_games.pdfIn PDF document text
    • https://kevonixoxudunu.weebly.com/uploads/1/3/0/7/130775897/kixosawufowulevonuwu.pdfIn PDF document text
    • https://cdn.sqhk.co/suvotoruwot/iajbiiN/bmw_bike_hd_wallpaper_for_pc.pdfIn PDF document text
    • http://trylait.club/how_to_install_delta_shower_valve_rough_inmbbbl.pdfIn PDF document text
    • http://latencfsrt.space/xuwejubet804lf.pdfIn PDF document text
    • https://getivafet.weebly.com/uploads/1/3/5/9/135960962/4098274.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pajipiruk.rf.gd/arturia_keylab_61_manual.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_off000120c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C9 5436 bytes
SHA-256: f6d2b1e8434e91aba0914c3bf5c08d1dc1926ecaa04ff899021805d501fd2dc6
font_01_sfnt_off00013335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13335 12096 bytes
SHA-256: 00a685a6b8a06e078852a1e499ab53e7e214023ccae1087c83d160eb6f0c5ce0

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