Malicious PDF — malware analysis report

Static analysis result for SHA-256 4256b8ca25249ba4…

MALICIOUS

PDF

80.2 KB Created: 2021-10-14 23:03:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-15
MD5: 53bb833646e15bc21ad69e10ce93393a SHA-1: d06bdfa4979c73371a5203afa9de063de36af870 SHA-256: 4256b8ca25249ba4276d5e2fa94bcb87394730f6ed81aa042826a8c9713d6c9a
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://intproplaw.com/admin/uploads/file/tagupulogevuzixezugoxe.pdf In PDF document text
    • http://hodoan.net/userfiles/file/pazigumiwuwumaralur.pdfIn PDF document text
    • https://susta.vn/userfiles/file/wafegofimigejuzunafo.pdfIn PDF document text
    • http://brno-skoleniridicu.cz/ckfinder/userfiles/files/22163455894.pdfIn PDF document text
    • http://delfosventures.net/userfiles/files/64840243827.pdfIn PDF document text
    • https://ipkameros.lt/userfiles/file/xeraninutelujewavuw.pdfIn PDF document text
    • http://girc.ncue.edu.tw/ckfinder/ckfiles/files/93618048881.pdfIn PDF document text
    • https://hatinhjobs.com/upload/files/98688364988.pdfIn PDF document text
    • http://autoneza.cz/UserFiles/File/jatogolom.pdfIn PDF document text
    • https://ccar.host168.com/data/fckeditor/files/9724053463.pdfIn PDF document text
    • http://sonnenheizungen.ch/fckeditor/editor/images/file/66980702264.pdfIn PDF document text
    • http://erbamedica.org/userfiles/files/tenexuxorabixuwutevep.pdfIn PDF document text
    • http://ruiqingchem.com/upload/files/67205774610.pdfIn PDF document text
    • http://studiodebiaggi.eu/userfiles/files/gekefenelezamekivilaxame.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/57556814616.pdfIn PDF document text
    • https://houstoncoinclub.org/FCKeditor/file/tenilefatonafiwif.pdfIn PDF document text
    • https://skiclubraonbaccarat.fr/pdf/3670384090.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/39323785665.pdfIn PDF document text
    • https://gplacestracker.com/userfiles/file/boxonepu.pdfIn PDF document text
    • http://thepokeluau.com/uploads/files/80092840852.pdfIn PDF document text
    • http://cplust.com/upload/serback/files/20210929004007.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/EqozwcbAC44/uplcv?utm_term=persistent+systems+ltd+share+pricePDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F0 18836 bytes
SHA-256: 0b1db89abaca473cea4bf42506c6e6b30402cfd1d56fa22b7583e445b07dfc6f
font_01_sfnt_off000102a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A8 10772 bytes
SHA-256: 81be21c664dbcbda06130f8b9fec58e06bfc99ac69673aec7aa08a21a5cee5a3
font_02_sfnt_off00011b47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1