Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8e9ab5acd81184c…

MALICIOUS

PDF

74.6 KB Created: 2021-02-27 13:21:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c97eaa1c52e2b2924336439f3b9f0370 SHA-1: 1490e548e1a43fff96ac32eb212ac19fde2e6a4c SHA-256: a8e9ab5acd81184c1e31a28d8004fe4b15deccee9d4c0e0ed3b3a49916f6f7cf
186 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
  • 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://botokaw.ru/award?keyword=how+to+get+my+brother+printer+back+online+windows+10 PDF link annotation
    • https://cdn.sqhk.co/tosuwukiwate/hjhajjR/nigerian_defence_academy_masters_courses.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449012/normal_6039fadf306b8.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwunikuneg/hehb5ja/49211132369.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428331/normal_5fc8936ed0bcc.pdfIn PDF document text
    • https://xolijusir.weebly.com/uploads/1/3/4/0/134016651/552525.pdfIn PDF document text
    • http://mpvideo.org/advanced_practice_nursing_an_integrative_approach54pw5.pdfIn PDF document text
    • http://jilet1.club/19844773689odrg8.pdfIn PDF document text
    • https://cdn.sqhk.co/mejabutumu/gjcEVhb/bugelufakuralamib.pdfIn PDF document text
    • https://cdn.sqhk.co/mimizajig/em49gij/guess_the_film_emoji_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/ijkFngg/marxism_definition_literature.pdfIn PDF document text
    • https://cdn.sqhk.co/navuwamas/tifjehg/formula_1_2020_game_xbox_one.pdfIn PDF document text
    • https://cdn.sqhk.co/jolodovi/hfX8QDO/jedotimemugowigikuroj.pdfIn PDF document text
    • https://cdn.sqhk.co/komajekolino/hiifidZ/xoguretixedolege.pdfIn PDF document text
    • http://urolog.xyz/10640180720oi9vx.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/viboxikuz/ministry_of_sound_clubbers_guide_2009.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_off0000e550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE550 6040 bytes
SHA-256: 9d630ab1d50e530aac587b8eb082d15158c52df357a4f1d0f46d2560a2922202
font_01_sfnt_off0000f9c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C8 10440 bytes
SHA-256: 7e80b6c20de9e3976a6adcc0dd7d84ab2b2d724a425a77cc98e3a8f21186a5a1