Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fb39fc1c5ff9d3a…

MALICIOUS

PDF

71.2 KB Created: 2021-02-23 13:01:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 00d8c19cbce9e88c99bd29733af3a468 SHA-1: 029ff58df64c72416d2a011d00a5ec5935e1cb23 SHA-256: 3fb39fc1c5ff9d3a8e550350ef6f7720bbb37c6b88838ca9760ba06688e36893
126 Risk Score

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://baarspo.ru/wix?keyword=semester+exam+review+guide PDF link annotation
    • http://clientesdkb.com/538599824643u9a2.pdfIn PDF document text
    • https://cdn.sqhk.co/zoluwumenad/gijddbX/febabodime.pdfIn PDF document text
    • http://xtw2.club/recharge_metro_card_online_new_yorkjzu5d.pdfIn PDF document text
    • http://hr-insider.com/bodyguard_telugu_movie_ringtones_free0iun2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493549/normal_601da5e96a3f1.pdfIn PDF document text
    • https://cdn.sqhk.co/keropolor/cjiXqib/74189373464.pdfIn PDF document text
    • https://cdn.sqhk.co/bovokolel/jiMibcB/mamafakawexojisenawe.pdfIn PDF document text
    • https://cdn.sqhk.co/jojikoxazew/eTTgeZm/best_car_driving_simulator_games_pc.pdfIn PDF document text
    • http://afracheat1.xyz/85683288934pbbgg.pdfIn PDF document text
    • https://cdn.sqhk.co/kidatufo/Fiajgx6/24123075585.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385197/normal_5ff698d3b7d11.pdfIn PDF document text
    • http://pubgmobiie.com/jine_mera_dil_lutiya_mp3ldnsn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444117/normal_601148c11c8cb.pdfIn PDF document text
    • http://noncomform.space/dejotisgbfsj.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/xjcJf8s/tor_browser_linux_mint_32_bit_download.pdfIn PDF document text
    • https://cdn.sqhk.co/pazakazagoz/xjjjaha/light_and_airy_presets_vsco.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/waxegatulo/sheet_erosion_definition_biology.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/zivuwomemuwopimexolezaz.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/16678072852.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_off0000d968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD968 5436 bytes
SHA-256: 77ec8927c566815bb713041646198b21c271037ed9c6e78778650f31ab6f1379
font_01_sfnt_off0000ebe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE3 10344 bytes
SHA-256: 6c49e771dd33984d9a90711f1e8cb1b2b58dc72341ab14ec74d5d889ee062cfc