Malicious PDF — malware analysis report

Static analysis result for SHA-256 191f39636f476b24…

MALICIOUS

PDF

76.7 KB Created: 2021-09-20 01:44:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-22
MD5: a8b6da749b5db2bb1060d0c267cd22d1 SHA-1: 05ae9caf714ba3f6adc18b192e5730e6968efe93 SHA-256: 191f39636f476b24a29dca708e36dde2fb479383c393ac9b147a4935101da5f7
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://balajitutorial.com/admin/userfiles/file/41659056587.pdf In PDF document text
    • http://cafehinglung.com/uploads/files/35112883811.pdfIn PDF document text
    • http://www.forteks.com.br/admin/ckeditor/ckfinder/userfiles/Images/vebadamugudefamuvi.pdfIn PDF document text
    • http://micruts.org/userfiles/file/sufaxamago.pdfIn PDF document text
    • http://topflexsports.com/uploads/tajubokakun.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134e18fd00ff---papizuwezexabolusidaxam.pdfIn PDF document text
    • https://gabconstruction.com/ckfinder/userfiles/files/12183427712.pdfIn PDF document text
    • http://stylekd.ru/files/mabojekiveli.pdfIn PDF document text
    • http://oris-am.com/editor_up/19247989739.pdfIn PDF document text
    • https://dammesliepas.lv/ckfinder/userfiles/files/72921056137.pdfIn PDF document text
    • http://timebymtm.com/upload/files/fenekuwokebijusegurivute.pdfIn PDF document text
    • http://kukdae.com/files/fckeditor/file/1952165889.pdfIn PDF document text
    • http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/60190321273.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16131da69edc4d---94583237794.pdfIn PDF document text
    • http://vesimport.ru/userfiles/file/12345223668.pdfIn PDF document text
    • https://qatarsecurityservices.com/public_html/userfiles/file/xavikawudedijazoluluri.pdfIn PDF document text
    • http://parejalecaros.com/adjunto/upload/fck/files/tazoneja.pdfIn PDF document text
    • http://soles2walk.com/data/file/71631154439.pdfIn PDF document text
    • http://enjoyisagenix.com/ckfinder/userfiles/files/gubonurobiva.pdfIn PDF document text
    • http://hftyby.com/upload_fck/file/2021-9-12/20210912064443162297.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613c859b56a4b---81484875963.pdfIn PDF document text
    • https://alcoquimicos.com/ckfinder/userfiles/files/toxez.pdfIn PDF document text
    • http://leicesterbiketec.com/userfiles/file/85013222752.pdfIn PDF document text
    • http://g-shocktou.com/user_file/file/10093079466.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=8+ball+pool+cheto+hack+apkPDF 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_off0000c807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC807 17420 bytes
SHA-256: f1154681d7ebd4f8c18bdcfff745b5b5349c8c79637a39680c9143b3dd95283a
font_01_sfnt_off0000f57a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57A 10348 bytes
SHA-256: 2ac38cc00a66f3cab18cd3d3ba467a76c43ac04ab647d6c7c2ac9f0709bdd479
font_02_sfnt_off00010cca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1