Malicious PDF — malware analysis report

Static analysis result for SHA-256 935d26dac0f2b087…

MALICIOUS

PDF

73.2 KB Created: 2021-02-25 15:08:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c1b80a69f485fd3246ce131e5bcd7b89 SHA-1: 6242093addf19dda10a61abb9de84e93fa96b150 SHA-256: 935d26dac0f2b08790822948677e801294737b28b95fa700646822e70214fd9c
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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/award?keyword=best+free+app+to+learn+chinese+characters PDF link annotation
    • https://cdn.sqhk.co/kobewudojuvo/h47jgje/birds_of_prey_trailer_music.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457320/normal_6009ea24a3ce9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408352/normal_5ff1ae5497365.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527164/normal_6021b9a22a5af.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/ziczjcz/idle_heroes_pve_tier_list_july_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409826/normal_5fce73a8cb2ed.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxovunevo/8HUgcye/30219654653.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ziwivazud.onlinewebshop.net/24769519979.pdfIn PDF document text
    • http://kopolug.myartsonline.com/fikutopelowujiv.pdfIn PDF document text
    • http://latuwukatagowa.epizy.com/treasure_grammar_practice_book_grade_4_answers.pdfIn PDF document text
    • http://sobogasitizi.epizy.com/69554261832.pdfIn PDF document text
    • http://tuwusobugepapa.epizy.com/bosch_series_6_dishwasher_installation_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/donid.pdfIn PDF document text
    • http://riluromeni.epizy.com/bringing_home_the_bacon_rs3_quick_guide.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_off0000e33b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33B 5152 bytes
SHA-256: 56ff7d3f0d590563dfa814ffd1e1f039786f10a2b0db133ba1d033f10d0766fb
font_01_sfnt_off0000f4be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BE 10324 bytes
SHA-256: e554e883ef2542b3e5c39c95e26795657905e2ab892f03a15e6dbf1812b65c73