Malicious PDF — malware analysis report

Static analysis result for SHA-256 4de7404f9dd356ff…

MALICIOUS

PDF

73.3 KB Created: 2021-02-14 04:13:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 25b5f8b980822cf4b3307393e048f77a SHA-1: 123af878c8dce74f33a7560cdfa98eb92648e12d SHA-256: 4de7404f9dd356ff81ca66845d8f114b5cfad8a5734859da72209a61f0cda4bd
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/wb?keyword=6th%20grade%20informative%20writing%20prompts%20common%20core PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4382973/normal_5fe2ca2657092.pdfIn PDF document text
    • https://cdn.sqhk.co/gujamozulas/Jgedii5/logo_quiz_by_bubble_answers_level_4_2017.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/C5Y0gcw/drum_set_notation_legend.pdfIn PDF document text
    • http://ebay-coupon.ru/worksheet_55_teaching_transparency_seismic_waves_answersra9u5.pdfIn PDF document text
    • http://carluxepaint.site/watch_nfl_online_free_live_streaming_patriots1ipbz.pdfIn PDF document text
    • http://littlenat.space/tekewonrpv3j.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/gi8nihi/4570177836.pdfIn PDF document text
    • https://cdn.sqhk.co/seseniluvus/jzeZidj/81420232635.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/ecXgjjc/zombie_craft_survival_best_free_shooting_game.pdfIn PDF document text
    • http://natgood.space/husqvarna_262xp_service_manual2qykp.pdfIn PDF document text
    • http://idealslimitalia-ufficiale.site/hay_day_hack_ios_no_jailbreakmsz5w.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/nimuwet/powerpoint_template_school_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gonasidupij/tunebutovininelidoxazi.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/ariston_washer_dryer_combo_armf125_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/50425170090.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_off0000e1ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AE 5748 bytes
SHA-256: 11c1b6e5e55f6466d12d9538a6e676ffe83b243b8e15c0c0915b0866d084f6d0
font_01_sfnt_off0000f535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF535 10196 bytes
SHA-256: 8234545060f5ad4a61fc978019a63c169e493aca02fe54c4f50ce7458c75d35a