Malicious PDF — malware analysis report

Static analysis result for SHA-256 f873b37851518292…

MALICIOUS

PDF

76.8 KB Created: 2021-10-05 05:06:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-17
MD5: ee196fea722eca9824eed8c5c7d05b97 SHA-1: 4e24c25a8435767aa186b5a7cfaa484af2a84bb0 SHA-256: f873b378515182923737fa4c70495fce7edd5b92a56d2e92a8cc3eec29fd8416
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://irlanc.ru/uplcv?utm_term=professional+and+ethical+responsibility+in+software+engineering PDF link annotation
    • http://train-in-japan.com/images/blog/file/ditivasiluvezopamisivafag.pdfIn PDF document text
    • http://herium.net/FileData/ckfinder/files/20210924_6A3025A72A864127.pdfIn PDF document text
    • https://renetravel.ro/images/files/niretowapipexogu.pdfIn PDF document text
    • https://dd-inside.de/userfile/file/naviwerivopogafajugem.pdfIn PDF document text
    • https://venus-forever.com/image/files/90040216083.pdfIn PDF document text
    • http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/lugojewizabofowe.pdfIn PDF document text
    • http://ndc-group.ru/uploads/files/75303787540.pdfIn PDF document text
    • http://suarezbeltran.com/aym_images/files/87232252686.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d24e98c703---16497550924.pdfIn PDF document text
    • https://bi-kiesabbau.de/cmsimple/images/file/tuwosedujax.pdfIn PDF document text
    • http://automyjka.pl/automyjka.pl/userfiles/file/bemupavenalov.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/181658865bfda5527769004889515abc/99539369582.pdfIn PDF document text
    • http://colokit.thienlonggroup.com/Images_upload/files/22156883213.pdfIn PDF document text
    • http://sevgineslianaokulu.com/ckfinder/core/connector/php/uploads/files/xedefinivukupub.pdfIn PDF document text
    • https://www.jancsoalapitvany.hu/ckfinder/userfiles/files/kinijifirobomepejon.pdfIn PDF document text
    • http://1yunnan.com/ckfinder/userfiles/files/23689683516.pdfIn PDF document text
    • http://amicalelaique-guyancourt.fr/ckfinder/userfiles/files/12604573700.pdfIn PDF document text
    • http://vetusmeter.com/images/upload/File/49373899452.pdfIn PDF document text
    • http://netflor.pl/upload/File/19129536239.pdfIn PDF document text
    • https://gionggiacam.gagiongvitgiong.com/ckfinder/userfiles/files/65061595076.pdfIn PDF document text
    • http://stringladies.cz/userfiles/nekuzowarapupezipu.pdfIn PDF document text
    • http://knx-shop.ru/admin/ckfinder/userfiles/files/vojiga.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_off0000c316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC316 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000db28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB28 17884 bytes
SHA-256: fd4a92c8acb446f1a08063c787351df3c955aca1ae7acfe70708165678e88f75
font_02_sfnt_off000109a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A8 11240 bytes
SHA-256: 5700cbd65b885d9a3bfb1b740ecfce55cde44e8087d29f4bfc06892d5c855301

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