Malicious PDF — malware analysis report

Static analysis result for SHA-256 f99ee39d51e93aba…

MALICIOUS

PDF

72.6 KB Created: 2021-09-09 10:20:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-13
MD5: c1ad20091b6de66b2f1bcbe47edf04ea SHA-1: c31b2f2451f3315f7a7586b823261cab5646056f SHA-256: f99ee39d51e93abaa5efaa8d967a5989942b3ad5f95ec9a19ba2739b285d579f
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://sportsht.com/userfiles/file/30215338737.pdf In PDF document text
    • http://wxhsbl.com/ckfinder/userfiles/files/20210909_070419.pdfIn PDF document text
    • http://gazdalkodjokosan.hu/img/userfiles/file/kulofukemel.pdfIn PDF document text
    • http://sherwoodonionfestival.com/ckfinder/userfiles/files/pisufawitiret.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/ba93aed6fc346804c7b682eacb34d2e9/44813562241.pdfIn PDF document text
    • http://mateuszkucharski.pl/admin/file/29137927725.pdfIn PDF document text
    • http://biogenetec.tw/image/files/20210904_153250.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/files/biraresaxekegufotuxe.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/dumbf1qfd4c42m0nvs6r85pv05/31799756767.pdfIn PDF document text
    • http://joeun-it.com/userData/board/file/gegexutokozujuruzemo.pdfIn PDF document text
    • https://majubesar.com/contents/files/14061723880.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613926b295865---87340815396.pdfIn PDF document text
    • https://kawanmto.info/contents/files/ponapiv.pdfIn PDF document text
    • http://riverla.vn/uploads/userfiles/file/9415009957.pdfIn PDF document text
    • https://www.luxboss.com/ckfinder/userfiles/files/52790116096.pdfIn PDF document text
    • https://www.allduniv.ac.in/ckfinder/userfiles/files/nuwefubulok.pdfIn PDF document text
    • http://prvugkh.ru/uploads/files/xexilujo.pdfIn PDF document text
    • https://medicabg.com/uploads/wysiwyg/files/podarulojeb.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/59710574681.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/161370e0e9b615---woxusupevupi.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612f72e5710ad---xusoxolotivomifubuzik.pdfIn PDF document text
    • https://aspirecambodia-edu.org/userfiles/file/5485214981.pdfIn PDF document text
    • http://vetportonaccio.it/userfiles/files/nifofaf.pdfIn PDF document text
    • http://mpwlawpa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/19850252932.pdfIn PDF document text
    • http://daearesort.com/FileData/ckfinder/files/20210902_A2D0C099B93E9BFD.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=lego+rock+band+ds+romPDF 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_off0000bb26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB26 10664 bytes
SHA-256: 6965ae2852d9670925742c6e51b26bee480a985a4a716bf395679528ad76c884
font_01_sfnt_off0000d350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD350 15564 bytes
SHA-256: 71e06c68e393c1e19165e43ff6c09ad49a80cfb6ff80f1110950b5eb48b8e983
font_02_sfnt_off0000fb23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1