Malicious PDF — malware analysis report

Static analysis result for SHA-256 4251720b10f5bd04…

MALICIOUS

PDF

67.0 KB Created: 2021-10-02 14:02:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-16
MD5: 90b257ca9b9c7e9b1e89bbcef061c1e1 SHA-1: 7f055ba1217cd8fee59aacf2a9500399bd1ff215 SHA-256: 4251720b10f5bd047f859ddc45e0d0120d79a3289c9d40e5df2474dced9986ab
146 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://allytemp.ru/uplcv?utm_term=11+ft+lbs+to+in+lbs PDF link annotation
    • https://aspirecambodia-edu.org/userfiles/file/jufuzobenevaja.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/30671587340.pdfIn PDF document text
    • http://shangrilayunnan.com/ckfinder/userfiles/files/66591756384.pdfIn PDF document text
    • http://doubles301.jp/files/ckeditor/files/40379623319.pdfIn PDF document text
    • https://sofanet.ro/ckfinder/userfiles/files/jusedanotufu.pdfIn PDF document text
    • https://ripedesign.com/app/webroot/files/fckeditor/file/3752106224.pdfIn PDF document text
    • https://volandovia.it/public/fileeditor/file/93986122940.pdfIn PDF document text
    • http://zatuchlina.cz/upload/file/9097042052.pdfIn PDF document text
    • http://residenzaeden-albisola.com/userfiles/files/84270024557.pdfIn PDF document text
    • http://villabrown.it/userfiles/files/68737832237.pdfIn PDF document text
    • http://studiomanzetti.it/userfiles/files/84069414932.pdfIn PDF document text
    • http://issaproject.com/app/views/panel/ckfinder/userfiles/files/10024309245.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/30889341047.pdfIn PDF document text
    • http://ohxto.com/uploaded_files/userfiles/files/6918937012.pdfIn PDF document text
    • http://zensushialiso.com/uploads/files/bejevevodesikapor.pdfIn PDF document text
    • https://mayxaydungthienlong.com/uploads/files/files/vurufufavi.pdfIn PDF document text
    • https://nadrozmerne-sklo.cz/uploads/dotakujodagulomo.pdfIn PDF document text
    • https://quote-supermarket.com/userfiles/file/77097850348.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614925f53b5a1---febuzubudejezanolujog.pdfIn PDF document text
    • https://elmawadah.com/userfiles/file/nebukixawilavamatetimixap.pdfIn PDF document text
    • http://okna-dvere-online.cz/media/upload/upload/file/famipiwi.pdfIn PDF document text
    • http://capitaldanceacademy.com/userfiles/files/41214945729.pdfIn PDF document text
    • https://atiksigorta.com/files/besitebixugapokitorakaset.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://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_off0000aceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC501 9908 bytes
SHA-256: 694a70970804a05094e7ee8fb12ebe44b8b4f23ec9c829c4b0108e5a0957ff28
font_02_sfnt_off0000daf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF0 13908 bytes
SHA-256: e0e7153a6daee648c41ef390e2e95771686d734a6041e7025a5ad16ac1a407e5