Malicious PDF — malware analysis report

Static analysis result for SHA-256 e537763d243317fe…

MALICIOUS

PDF

76.6 KB Created: 2021-02-22 17:38:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 6bba34e7fcda3e43a8d000a323b2057a SHA-1: 91f3b3811019d2d4f4bc394ee7f641abce32cad5 SHA-256: e537763d243317fe3c625ba812a0bc8770036f9fbfca1aabc7f65a91e927749a
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://baarspo.ru/wix?keyword=virus+worksheet+high+school PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4410953/normal_5fdf921b3797a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485166/normal_5fef3f67c01b3.pdfIn PDF document text
    • https://ludekomu.weebly.com/uploads/1/3/4/5/134505051/jajijovegix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421354/normal_601f8000beccf.pdfIn PDF document text
    • http://motuxagajoweji.22web.org/cost_accounting_multiple_choice_questions_with_answers.pdfIn PDF document text
    • https://fimudelowuj.weebly.com/uploads/1/3/1/4/131455024/tuwozeta.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366044/normal_5ffc5712b70a7.pdfIn PDF document text
    • http://debegezuvume.iblogger.org/ebay_app_not_working_on_android.pdfIn PDF document text
    • https://fogoranamixite.weebly.com/uploads/1/3/5/3/135390362/tarefekokukup_puvubuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wofukisunoxo.epizy.com/nebebesovevujojel.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/27905072481.pdfIn PDF document text
    • http://xuxejoser.rf.gd/how_to_deal_with_surface_water.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/ls2208_spec_sheet.pdfIn PDF document text
    • http://pifinidub.rf.gd/lakeburawidobar.pdfIn PDF document text
    • http://ganesuk.epizy.com/idioms_worksheets_for_4th_graders.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_off0000eed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED1 4972 bytes
SHA-256: 01f8d2fb2abfd5f54036d36898f770a1c604564e8fda0c81fa32302f482cd709
font_01_sfnt_off0000ffd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD8 11060 bytes
SHA-256: 69fb31131d79939e11ccd75b82b71b82072ba7a4a26c919a3a6e457f0f7c4a0a