Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef3effa9306ea03f…

MALICIOUS

PDF

69.1 KB Created: 2021-01-27 00:50:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 7ee64657e09fb125c825b1cae35f9a32 SHA-1: cab963b6dc27932f019d170b856a8fdf100118db SHA-256: ef3effa9306ea03f0c08a5747b3ed9e2dc0b1e8be34dbe989aa9fd543b96e662
184 Risk Score

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
  • 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 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/123?utm_term=how+to+add+error+bars+in+excel In PDF document text
    • http://doctora.club/gixedafegefanavefvy8gg.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/jNEjdgi/telecharger_car_driving_school_simulator_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/lejesapazud/RTxorih/lazonepizipifurep.pdfIn PDF document text
    • https://cdn.sqhk.co/niserutom/HhgnYii/slot_car_racing_sets_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/noxibogalu/pgcjjih/wopefixotinaxog.pdfIn PDF document text
    • https://cdn.sqhk.co/naxusepimosa/gijjdpr/tovilukotafezeta.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/cs2geif/blackfish_lives_matter_shirt.pdfIn PDF document text
    • http://fodokimi.22web.org/printable_cursive_worksheets_for_3rd_grade.pdfIn PDF document text
    • https://cdn.sqhk.co/peluxisomex/ZiengcL/pics_studio_apartments.pdfIn PDF document text
    • http://subumobo.22web.org/dow_froth_pak_210_data_sheet.pdfIn PDF document text
    • http://umkatrade.ru/avengers_x_reader_burdenu74zy.pdfIn PDF document text
    • https://cdn.sqhk.co/bajipugotox/jagf2hb/swingman_shorts_miami_heat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dezezefisimel.rf.gd/65690095246.pdfIn PDF document text
    • http://jefebewo.epizy.com/ielts_letter_writing_topics_with_answers.pdfIn PDF document text
    • http://veruzixiki.rf.gd/business_intelligence_tools_visual_studio_2008.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_off0000d292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD292 5192 bytes
SHA-256: 6ed9d3dd427b05f6a69b0556074750b50aa88ee99cf9b9645241f856c8ce3cb0
font_01_sfnt_off0000e459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE459 10420 bytes
SHA-256: 0c5dfdea83fde95ca6e3d0c919d7abf0c1489324629fd9cbe40cccc94dbaefb7