Malicious PDF — malware analysis report

Static analysis result for SHA-256 21d7d0bcae841261…

MALICIOUS

PDF

68.2 KB Created: 2021-02-12 16:33:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0f9d1b03607cc261f896b5eec035118d SHA-1: 43d8f5230cae545334ad424383767d84dc4dac2e SHA-256: 21d7d0bcae841261b60b68ee5d99adf18354b7ba98ca295c3214c0df0d2a96f5
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=precalculus+summer+packet+answer+key In PDF document text
    • https://cdn.sqhk.co/retagigimusa/hjfEQEK/ultimate_mafia_car_driving_classic_car_stunt_racer.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvupewog/igfJeDk/champion_of_the_gods_choice_of_games_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/bizufunido/jipN9gf/movie_matrix_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/vumivatuvi/ihfgfaW/rulotuloxo.pdfIn PDF document text
    • https://cdn.sqhk.co/dibidoretu/bt0hdd8/nike_air_ghost_racer_size_15.pdfIn PDF document text
    • https://fugesozuxi.weebly.com/uploads/1/3/0/7/130739141/8887882.pdfIn PDF document text
    • http://karnaval.host/tanotavifexusazanugajeria0b81.pdfIn PDF document text
    • https://faliroralomi.weebly.com/uploads/1/3/0/8/130874474/sotinerilajen.pdfIn PDF document text
    • http://formverifiedbadge.com/discounted_cash_flow_excel_sheetv63et.pdfIn PDF document text
    • http://disclosures.space/gasafamanuwogefkwbc6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424997/normal_600555ff7345c.pdfIn PDF document text
    • https://pedadadaroteb.weebly.com/uploads/1/3/0/9/130969242/9131563.pdfIn PDF document text
    • http://logoped-samara.ru/xamoxujaxaxdvx.pdfIn PDF document text
    • https://cdn.sqhk.co/solumapidema/Ou9jigi/frozen_potstickers_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/menasimax/g2jfL3e/the_lawless_clone_wars_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464863/normal_6006d7ff86055.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/tamil_caller_tune_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/zevijazazixegewudu.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/85685405897.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/benim_hocam_corafya.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_off0000ce76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE76 5340 bytes
SHA-256: fcc6f6fb5782b658cbb0653d6bc6b066305304f5359c70381d4366843261af5c
font_01_sfnt_off0000e0a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A1 10520 bytes
SHA-256: 6444bcda805654d20f8ae7ba25707b21491854c2af66c31cbfc3a5c6bc7133dd