Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2350654ebe81d29…

MALICIOUS

PDF

76.7 KB Created: 2021-02-20 04:01:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: e674ec0865a21cd3cc3f589353c57617 SHA-1: ef4d77b4dd6e01a8c27fb82d5a70bd7d0535bbe4 SHA-256: b2350654ebe81d293195aa92f8fe85407072f76e902294f9d1a926c6bb2085cf
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://leonvi.ru/wb?keyword=the%20torah%20book%20pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4457839/normal_5ffd48483494e.pdfIn PDF document text
    • http://bumaga.bz/gw2_crafting_guide_armorsmith47i4t.pdfIn PDF document text
    • http://bezprovodov.guru/solving_quadratic_equations_all_methods_worksheet_answer_keyoyim7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444636/normal_602fdda0927b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385012/normal_5fc6e023eed09.pdfIn PDF document text
    • http://thefortykuti.com/zalavr1k4b.pdfIn PDF document text
    • http://strongcreditscore.info/graphing_rational_functions_worksheet_and_answers95g3t.pdfIn PDF document text
    • http://hotita.fun/tower_defense_simulator_wiki_zombieslcelr.pdfIn PDF document text
    • http://remont-kvartir-otzyvy.moscow/17585787042tssuk.pdfIn PDF document text
    • http://rejuxipo.iblogger.org/xesulebuwimomalisi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zusomiverufal.rf.gd/54030322337.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/nakasupuvojosixutufeti.pdfIn PDF document text
    • http://xaxigodugekesiw.epizy.com/trois_gymnopedies_piano_sheet.pdfIn PDF document text
    • http://lojuvep.epizy.com/itv_news_reporters_asian.pdfIn PDF document text
    • http://magikid.epizy.com/17793864995.pdfIn PDF document text
    • http://nepogewapiw.epizy.com/formal_compassionate_leave_letter.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/recommendation_letter_format_for_college.pdfIn PDF document text
    • http://zepogofeto.epizy.com/certificate_of_conformity_of_quality_management_system.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_off0000f016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF016 5072 bytes
SHA-256: a81c47d4b81ca8762cf8c051fb9bf679e9c942a59602a9d07e24b79ec609879c
font_01_sfnt_off00010149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10149 10836 bytes
SHA-256: 20b34182232c0e8a99c4f5da76bff6b727321550743ec3852a9bd367abf361db