Malicious PDF — malware analysis report

Static analysis result for SHA-256 21e4d1cfcfff83fb…

MALICIOUS

PDF

66.2 KB Created: 2021-02-23 20:45:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: b54e7c8310385878367966f565265eda SHA-1: 7ccc81e61c5ead43281adcf47e80057dd752f53e SHA-256: 21e4d1cfcfff83fb4755b2cca1ac5eb4243189938ffa5c63c3244d67268e199a
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/wix?keyword=anime+calendar+2020+printable PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476272/normal_5fd1764118773.pdfIn PDF document text
    • http://mavito.online/76830599961t6xi3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464539/normal_5ffc48036fa04.pdfIn PDF document text
    • https://cdn.sqhk.co/xinulezebi/qnihcgh/farmer._io_crazy_games.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373509/normal_602518338eb25.pdfIn PDF document text
    • https://cdn.sqhk.co/kerikone/hieghlG/91876550111.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465259/normal_5fe2e2b285044.pdfIn PDF document text
    • https://cdn.sqhk.co/pajugeluj/Y8ijrjj/16042302591.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dukodisedibuji.epizy.com/wesixujomekonagejafunuk.pdfIn PDF document text
    • http://xesugowoxufe.epizy.com/dorabuxorove.pdfIn PDF document text
    • http://rugeminawa.epizy.com/zupezeduzelirijowikexujow.pdfIn PDF document text
    • http://gumelojapa.epizy.com/17517914520.pdfIn PDF document text
    • http://buxuzob.epizy.com/tokyo_ghoul_re_asphyxia_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/wekasoxafufimid.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/android-_1_mod_games_wcc2.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/4th_grade_math_word_problems_workbook.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/lefugojizijupiverupivo.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_off0000c6bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6BC 5444 bytes
SHA-256: e15dd030a94a81b6c5c97249d6c74930f0ba15de06c049079a57ea00bbee20dc
font_01_sfnt_off0000d91a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD91A 10208 bytes
SHA-256: f327e068f96dded8473c4b45e99a868a8f7465aac9a893732c26ae612e5d0f5a