Malicious PDF — malware analysis report

Static analysis result for SHA-256 3db881ddca2f4f0b…

MALICIOUS

PDF

71.8 KB Created: 2021-03-01 08:47:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 1b9447aed373d5b99f48b925cc744b3f SHA-1: e03eff7262466be3aa4ea2f74b07b253726a5d5f SHA-256: 3db881ddca2f4f0b91e97f4a360b26eeac8173d38cc57e1b4886d4753af20d90
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://kuzutuzo.ru/wix?keyword=poweramp+trial+apk+download PDF link annotation
    • https://cdn.sqhk.co/pugijuzo/jemgghj/drag_car_racing_videos.pdfIn PDF document text
    • https://cdn.sqhk.co/wifinalimow/vjfiege/btd_battles_boomerang.pdfIn PDF document text
    • https://tamipabofoj.weebly.com/uploads/1/3/4/8/134876193/watogotafe.pdfIn PDF document text
    • http://subbellassecret.com/sdge_san_diego_power_outagev5xl5.pdfIn PDF document text
    • https://folozulo.weebly.com/uploads/1/3/5/3/135351090/287f3.pdfIn PDF document text
    • https://cdn.sqhk.co/tevimuwijile/vWnijhd/78578834977.pdfIn PDF document text
    • https://cdn.sqhk.co/goxufime/5H9jdhf/64712330578.pdfIn PDF document text
    • https://sirowatogiwu.weebly.com/uploads/1/3/2/8/132814809/ruvet.pdfIn PDF document text
    • https://cdn.sqhk.co/lefidotoxono/aAieogi/vuxopaxa.pdfIn PDF document text
    • https://gawakugoful.weebly.com/uploads/1/3/4/7/134757428/d1cb7dc28df5d.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/jiQODib/tiktok_download_free_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/vagizabibo/OlicBgf/english_grammar_video_classes_free.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/0jehcIh/red_sunset_meaning.pdfIn PDF document text
    • http://tokepubex.getenjoyment.net/what_games_are_compatible_with_thrustmaster_t80.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kewetanetoza.atwebpages.com/how_to_thread_old_singer_machine.pdfIn PDF document text
    • http://jitawidavez.atwebpages.com/math_proving_examples.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_off0000de75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE75 5084 bytes
SHA-256: f969fb642fcc67b5ebb66acb775e77293e1f3e0044817a01d721faac54c90b3e
font_01_sfnt_off0000efba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBA 10136 bytes
SHA-256: 858bf3586d28081a0779d1a22ba174c4060919d58293c6579091e3a55f5d38fd