Malicious PDF — malware analysis report

Static analysis result for SHA-256 6345bffebb837656…

MALICIOUS

PDF

74.1 KB Created: 2022-04-13 09:48:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-29
MD5: 83623ec40d89aebb70fc23da5a4ac6f5 SHA-1: 48c48af56d080955d7f2610dce618bbc8232655d SHA-256: 6345bffebb837656fe0d7a14f1dc5271dcf33c3b987ad8dfc0491bdca4f50648
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://www.tocarufar.com/sgc/Assets/Plugins/CKEditor/kcfinder/Uploads/files/joporejisuzewegolujok.pdf In PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/7vnugs1bl6ammsvof1jbvfl55r/67618524732.pdfIn PDF document text
    • http://gzky.cn/dubeite/ckfinder/userfiles/files/20220222_175642.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/sedoxuvoneverutimebezu.pdfIn PDF document text
    • http://lam.kiev.ua/kcfinder/upload/files/66249796072.pdfIn PDF document text
    • https://leg-vein.jp/kcfinder/upload/files/waguletixekeralibup.pdfIn PDF document text
    • https://www.uralhelicom.com/frontend/web/js/kcfinder/upload/files/zijufejisixoluxemut.pdfIn PDF document text
    • http://www.banzolaassociati.com/gestlab/kcfinder/upload/files/wumotewitoxaluzuxoziwegon.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1623536b8219f9---kugavero.pdfIn PDF document text
    • https://turbooto.vn/upload/files/81250474745.pdfIn PDF document text
    • http://amis-simserhof.fr/kcfinder/upload/files/87115143819.pdfIn PDF document text
    • http://asbazainville.org/userfiles/file/86792232475.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16235bceb5aad8---96793877368.pdfIn PDF document text
    • https://insetclean.com.br/kcfinder/upload/files/10344727794.pdfIn PDF document text
    • http://www.miyadenthai.com/image/upload/File/pizorakuno.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/27918657409.pdfIn PDF document text
    • http://greenlasthousing.com/admin/kcfinder/upload/files/81310281655.pdfIn PDF document text
    • http://stellar-toys.com/ckfinder/userfiles/files/mefixisolejaxuwozibeduwe.pdfIn PDF document text
    • https://scorestop.com/uploads/files/juvibudif.pdfIn PDF document text
    • http://haozuowenwang.com/imagefiles/file/35634229112.pdfIn PDF document text
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/mudakexawanixuxarunufuke.pdfIn PDF document text
    • https://fecuq.co.za/YmrXLWy8?keyword=what%20oil%20does%20a%202003%20bmw%20330xi%20takePDF 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 extracted file (font_00_sfnt_off0000b77e.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000b77e.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b77e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB77E 11136 bytes
SHA-256: 189580ceb5b0db386a41b89dd3a8f9e9208fea90c28b915960e3b53d25113bad
font_01_sfnt_off0000d19e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD19E 19224 bytes
SHA-256: aeb7950b2993852087e84570dc7a2465425e61207bf91b65470ddb9934de1952
font_02_sfnt_off000102bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1