Malicious PDF — malware analysis report

Static analysis result for SHA-256 f99f2208003b4c57…

MALICIOUS

PDF

79.2 KB Created: 2021-09-23 14:47:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-13
MD5: 238f9ab4d01bd4d50cdee2b1d8778201 SHA-1: 09ee908a36d910bd9412b99e697a3e853072b509 SHA-256: f99f2208003b4c57fca6980f95e5bcc712d343b4409ea133ae28d3b9791a4d59
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • 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://ubk-sad.de/azubi/userfiles/files/28169484532.pdf In PDF document text
    • https://vibingvibes.com/userfiles/files/83536048752.pdfIn PDF document text
    • https://infrastone.com/userfiles/files/2701452671.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/b9dd0ffd6e8b74ec1853d94c6da32d5b/zedizadagifokakol.pdfIn PDF document text
    • http://ozt.zielonetarasy-cieplice.pl/uploads/userfiles/files/zakawiwaduzatujupuvazas.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/ziwaruzaf.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/c511g7qfoeujmggl748p5ng72j/68550245503.pdfIn PDF document text
    • https://gonguyenkhoi.vn/upload/files/83356605288.pdfIn PDF document text
    • http://matsusushionline.com/uploads/files/nemewuxizovusa.pdfIn PDF document text
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/10392461066.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/45703160872.pdfIn PDF document text
    • https://ka-base.no/images_students/files/bejepivanowefanofibofop.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/33518889290.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613040dfc873d---dotofikinomo.pdfIn PDF document text
    • https://postelezmasivu-liberec.cz/ckfinder/userfiles/files/94047503266.pdfIn PDF document text
    • http://poexali.org/static/image/_u/system/files/53768523106.pdfIn PDF document text
    • http://tvkinter.com/file_media/file_image/file/pokobesifuwalekugixetok.pdfIn PDF document text
    • https://cargoservice.pl/cargoservice/userfiles/file/werexapuri.pdfIn PDF document text
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/71787480027.pdfIn PDF document text
    • http://wxmx.cn/upload/ckimg/files/202109200423547117.pdfIn PDF document text
    • http://thehedgerowchronicles.com/ckfinder/userfiles/files/87739588079.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/20237117631.pdfIn PDF document text
    • http://qdxqw.com/uploadfile/file/17472246244.pdfIn PDF document text
    • http://problemconsulting.com/img/download/files/58377271007.pdfIn PDF document text
    • http://abogarestudio.com/userfiles/file/71819083913.pdfIn PDF document text
    • https://osakaav.com/userfiles/files/5579019709.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=biological+science+freeman+3rd+canadian+edition+pdfPDF 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_off0000d0bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0BB 11188 bytes
SHA-256: da625f6c6737f268928578ae1afd3950d544a6203b72f9ad4e8fc6191971ce34
font_01_sfnt_off0000eac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC6 16736 bytes
SHA-256: feb89786e411b82a85e935cd6194f4581a0324a2c5eb20b52169c70cc6a78105
font_02_sfnt_off000115f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1