Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a76ddc2ce466916…

MALICIOUS

PDF

71.1 KB Created: 2021-02-28 06:49:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 9184e2565b419351b9e93faa5c2c1ac7 SHA-1: e2b8e73a870fdf13c68ba7ef91f57a4a0aa5b01b SHA-256: 7a76ddc2ce466916692ca455d7d71e11bfdbcf28402fdf7be22f34265ea5fa3b
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://nipisod.ru/award?keyword=sc+dmv+road+test+score+sheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4406229/normal_5fc5ea9db54d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469617/normal_60043514a8900.pdfIn PDF document text
    • http://smartcoin.design/solucionario_libro_biologia_y_geologia_3_eso_sm_savia29y1n.pdfIn PDF document text
    • http://natorg.fun/geometric_shape_worksheets_for_3rd_gradesnfnf.pdfIn PDF document text
    • http://3gusevshop.website/cisco_introduction_to_networks_notes9pwyn.pdfIn PDF document text
    • http://bigops.fun/ideal_protein_protocol_sheet4hvx3.pdfIn PDF document text
    • http://damvglaz2.xyz/67220783961eyea3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452607/normal_602a5a0f00a79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451549/normal_6022085f171b1.pdfIn PDF document text
    • http://it50disconto.pro/rezibevafuzoxmwcu.pdfIn PDF document text
    • http://help-mediasupport.com/xuzunupifetuxemafegaqwq5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/murudute/crontab_format_solaris_10.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/allied_telesis_management_software.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/81238468196.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_off0000db07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB07 5312 bytes
SHA-256: aa87a44c34b2ce29f762bff85c84a72eeec5a5916d7d47ace1b36269e4a080bc
font_01_sfnt_off0000ecec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEC 10184 bytes
SHA-256: 87cf8838e109d292d2f1c09294d7230013a007021d0b4c944d6a9428ee031143