Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a5feca85f23693f…

MALICIOUS

PDF

64.0 KB Created: 2021-02-18 20:12:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 5f0c4da40e0eb0e2179e8b19686afffb SHA-1: 181be9e0a5fcb27c0f565dd9e91f02e12cc69493 SHA-256: 3a5feca85f23693f2a7835a2ee18c7ea1fa35384c038b31406c8cabae11689a6
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://seumenha.ru/wix?keyword=gel+electrophoresis+worksheet+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445879/normal_5fcbe4cf6a7db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366360/normal_5fd0a760c4653.pdfIn PDF document text
    • http://redirunna.xyz/839677367070zq5p.pdfIn PDF document text
    • https://cdn.sqhk.co/wumerelup/QhdJjdD/galaga_wars_all_ships_unlocked_apk.pdfIn PDF document text
    • http://tophomework.space/reduction_in_force_policy_template5zqsc.pdfIn PDF document text
    • https://cdn.sqhk.co/geruxibab/hE5KzVp/conspiracy_synonyms_definition.pdfIn PDF document text
    • http://tertov.xyz/7630433478358ny6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424692/normal_5fe2b7c7b5e8f.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/jRhdhdY/robot_fighting_2_minibots_3d_mod_apk_download.pdfIn PDF document text
    • http://infonewsuk.site/cafe_racer_helmets_ukgw7mp.pdfIn PDF document text
    • http://iqecoportal.ru/powoseguredewilojalmvig.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/shfhhlJ/you_had_me_hello.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/nuxulikiwab/25848021488.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/73410122291.pdfIn PDF document text
    • http://puwovejivu.rf.gd/17796048654.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/analise_combinatoria_morgado.pdfIn PDF document text
    • http://vudamup.rf.gd/bootstrap_template_with_slider_free.pdfIn PDF document text
    • http://nutagegoruzolow.rf.gd/cykler_metro_nrreport.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_off0000bf4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF4F 5208 bytes
SHA-256: 057ef2b95bca315d68bb1ac7c9e7e21b3805487d8b6ad25bdbc2966cbd4a5b1a
font_01_sfnt_off0000d115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD115 9868 bytes
SHA-256: 445f73734071d7f2989af2970ab192d061718224e2d4f35a530fb164257efc07