Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f8c4c50cbf7654…

MALICIOUS

PDF

78.0 KB Created: 2022-04-06 17:34:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-01
MD5: 3f83c7e539a844a27aea45ba1a67ca83 SHA-1: b3b33ab8cd968020a14a3ab3cd14a0642b101393 SHA-256: a4f8c4c50cbf765462c7bca0bd1e1aeec31ae8a5d666f2f350f0f593ceb7066e
226 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://sunuf.co.za/YmrXLWy8?keyword=search%20for%20google%20account%20name PDF link annotation
    • https://fexagire.weebly.com/uploads/1/3/0/7/130775556/84221aa4.pdfIn PDF document text
    • https://xehowo24h.com/images/ckeditor/files/50955157814.pdfIn PDF document text
    • https://rawixokuboja.weebly.com/uploads/1/3/4/0/134097397/xaguvibij.pdfIn PDF document text
    • http://asclyziarskyklub.sk/userfiles/file/25591868899.pdfIn PDF document text
    • https://zajadibagaku.weebly.com/uploads/1/3/5/3/135341716/kodot-binajepemen-rareriwenakaz-wisetakibotereb.pdfIn PDF document text
    • https://pipawini.weebly.com/uploads/1/3/4/8/134888109/463b2eb807cea.pdfIn PDF document text
    • https://tomaszbizon.pl/web/uploads/files/29105239396.pdfIn PDF document text
    • https://kodabovoxalomas.weebly.com/uploads/1/3/5/3/135340354/wibakezefeliretoj.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/3385468202.pdfIn PDF document text
    • https://faromemexe.weebly.com/uploads/1/3/5/3/135399009/talofuvega.pdfIn PDF document text
    • https://visorupa.weebly.com/uploads/1/3/5/3/135305290/fudipo_nakujebawa.pdfIn PDF document text
    • https://fovezifume.weebly.com/uploads/1/3/0/8/130874198/pivosaxizefevov.pdfIn PDF document text
    • https://potisejomi.weebly.com/uploads/1/3/6/0/136092970/xuwunafe.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/c85d6c04bb30901ea15a3e09a9084ce4/mujanifijop.pdfIn PDF document text
    • https://bofubesal.weebly.com/uploads/1/3/5/9/135958810/xixegijonol_fefavakobof_fukojatuwarowef.pdfIn PDF document text
    • http://cafemsoffice.com/userfiles/files/5959498411.pdfIn PDF document text
    • https://sobateracota.ro/mm/file/kupibofaju.pdfIn PDF document text
    • https://nirulutot.weebly.com/uploads/1/3/4/7/134700174/kubobotu-duxozipokuvumuz.pdfIn PDF document text
    • http://www.acs-pack.fr/kcfinder/upload/files/69452917129.pdfIn PDF document text
    • https://funosojo.weebly.com/uploads/1/3/5/3/135336125/2194507.pdfIn PDF document text
    • https://sabovewedasujak.weebly.com/uploads/1/3/4/4/134493104/wosujazubiwu.pdfIn PDF document text
    • http://takramaipai.com/mypicture/file/59283397911.pdfIn PDF document text
    • https://generixa.weebly.com/uploads/1/3/5/3/135350481/ketez_janorisobuteb_butidagogunedej_bowidojomep.pdfIn PDF document text
    • http://minuspk.ru/minuspk.ru/userfiles/file/6330763624.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 extracted file (font_00_sfnt_off0000cada.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000cada.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCADA 17908 bytes
SHA-256: 80cd1d008908bb65780f98c06451e34c0c7456362b47671acc73f8164ada9cfe
font_01_sfnt_off0000f988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF988 10700 bytes
SHA-256: d2d7896e4cab3349e933a17e887432bb5a08090cbddc0de3e788c3c7bcc3c135
font_02_sfnt_off000111f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1