Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d75da1e69e2121…

MALICIOUS

PDF

84.0 KB Created: 2021-10-12 08:00:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-28
MD5: ee154b56a5188949609ddb5fc91f4ad9 SHA-1: fe9f70c22d0e44a5b87c4b8dafa36a07ebe57b78 SHA-256: c5d75da1e69e212109d3a7de02de842944c7b977287c834cae1ad1718af2369d
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://mkycc4.com/kycc4.com/userfiles/files/57374235596.pdf In PDF document text
    • http://vamaconsulting.sk/userfiles/file/tajawit.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.net/ckfinder/userfiles/files/tajoxexozaxakomarobiwozox.pdfIn PDF document text
    • http://preiswerte-unterkunft-papenburg.de/mediapool/23689297123.pdfIn PDF document text
    • http://purplebyanki-com.bvirani.com/ckfinder/userfiles/files/32352528473.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615678f0c027f---zabugeraras.pdfIn PDF document text
    • https://southafricapools.com/contents/files/90131786086.pdfIn PDF document text
    • http://cassotech.nl/site/data/ws/files/depijew.pdfIn PDF document text
    • https://thehouseproduction.net/file/26494253004.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613101d268020---52539049651.pdfIn PDF document text
    • http://studiopassarotti.it/userfiles/files/19741655296.pdfIn PDF document text
    • http://www.dr.schure.net/ckfinder/userfiles/files/2174815793.pdfIn PDF document text
    • http://minhanh.com/files/rugavenutejifiga.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20211003_F94668640001AC7D.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/c35a18b2d530b99e0c6c16637b156e38/59413825112.pdfIn PDF document text
    • https://yumasri.com/assets/ckfinder/userfiles/files/vobaxudomebud.pdfIn PDF document text
    • http://nawooelcs.com/upload/userfiles/2021/09/files/210920000322.pdfIn PDF document text
    • https://rumahbaruku.com/contents/files/56042949829.pdfIn PDF document text
    • http://emaaravm.net/upload/files/43738901987.pdfIn PDF document text
    • http://twapp.freshkon.com/upload/files/68466308231.pdfIn PDF document text
    • http://kolesnikov.pro/ckfinder/userfiles/files/58121493305.pdfIn PDF document text
    • http://tuvantindat.com/uploads/2021-09-11/images/files/43850349402.pdfIn PDF document text
    • http://manhchenang.vn/webroot/img/files/wiledesemomowiduvarazawuz.pdfIn PDF document text
    • http://xnucleus.com/members/member_images/files/33994321454.pdfIn PDF document text
    • https://khogiaydantuonghanquoc.com/images/news/file/68991807674.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/bbd6ea727d11b3b7c97956e5e3ba16eb/bedawasoravi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/BGAemAmcdTc/uplcv?utm_term=bus+body+structure+design+bookPDF 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_off0000df52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF769 10836 bytes
SHA-256: 553aff901a1d3a3db7602c915198906bda6eb0688382909284b59a15b9052c88
font_02_sfnt_off0001106e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1106E 18932 bytes
SHA-256: b17d5137cbf07368b006f5a23ece00fe230ec358f5c9c85ef433183e8a9b7db3