Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3f23ca940f0ee26…

MALICIOUS

PDF

72.3 KB Created: 2021-02-12 13:41:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 5017d5d4f6c9629ad7311168e65b4929 SHA-1: de5117c7c29cd509f5dbcdf598de1ad9f3b9b682 SHA-256: a3f23ca940f0ee26461f7968f3bff4276ca2ba21833289cedbc95422dab46f82
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://seumenha.ru/123?utm_term=hertz+dream+cars+locations PDF link annotation
    • http://lidzadva.xyz/18511702241eix9.pdfIn PDF document text
    • http://lamorebeduzakoj.22web.org/jimerutonunuvozaruri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500665/normal_5fe63493193c9.pdfIn PDF document text
    • http://bettermoneytips.com/gmat_examg9x6u.pdfIn PDF document text
    • http://riniwovefaraw.22web.org/midetixatumowajiruviw.pdfIn PDF document text
    • http://cmbmarketing.agency/rarigezukimugepagunzjutu.pdfIn PDF document text
    • http://opros.xyz/python_3._6_for_windows_7_freezhaon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365567/normal_6025b410f103d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402244/normal_5fd7502152e3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428329/normal_5fd39bff26e36.pdfIn PDF document text
    • http://tubezadobuzaro.66ghz.com/mixture_and_compound_worksheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413119/normal_5fe44a887dba4.pdfIn PDF document text
    • http://options.expert/jexumedu5xhh5.pdfIn PDF document text
    • http://vibawukukar.iblogger.org/paixo_de_aluguel_dublado_utorrent.pdfIn PDF document text
    • http://fb-ig-violation.com/kujebaxugogusadamelxuxe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dimegebewode.epizy.com/sorofemabojeb.pdfIn PDF document text
    • http://bopufadepop.epizy.com/aap_bronchiolitis_guidelines_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/frost_sullivan_research_reports.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_off0000de40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE40 5096 bytes
SHA-256: e91ec403cc5a12225fe12149bb671a0a85b8d57e0de653b0af81fff864faae56
font_01_sfnt_off0000ef7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7F 10948 bytes
SHA-256: 0c1482fedae17f4493926fefcec4aff22bedb1d895d4525fa59741a51f0124b1