Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb8bfbd49e6e8803…

MALICIOUS

PDF

100.0 KB Created: 2022-04-04 23:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-09
MD5: 9ade626fad27cf3992091dd89476bc0d SHA-1: 423cb94420945f668807bce974ff1f02a880ce21 SHA-256: cb8bfbd49e6e8803e73fc5727d38cc4b40831d303b2ea9a61132c3af5adf7c7d
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://sunuf.co.za/YmrXLWy8?keyword=hp%20officejet%204500%20operating%20manual PDF link annotation
    • http://shasenconsulting.com/assets/ckeditor/kcfinder/upload/files/21321147921.pdfIn PDF document text
    • https://tupokigefadewun.weebly.com/uploads/1/3/4/7/134702618/a0c1efbc0b2be53.pdfIn PDF document text
    • http://linyuepharm.com/upload/files/4707628031.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20220402065147_55nxfo.pdfIn PDF document text
    • http://kinel-hunter.ru/upfiles/file/73428532482.pdfIn PDF document text
    • https://alarouba.com/ckfinder/userfiles/files/98072754967.pdfIn PDF document text
    • http://uni-soar.com/userfiles/file/25787903623.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/54035563776.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/lepapavosilukofuzidurud.pdfIn PDF document text
    • https://vusuneroroloxik.weebly.com/uploads/1/3/4/0/134096702/kolibijawerijiles.pdfIn PDF document text
    • https://fizemovumevomuf.weebly.com/uploads/1/3/4/4/134491325/6097074.pdfIn PDF document text
    • https://lakaboro.weebly.com/uploads/1/3/4/5/134502670/4940795.pdfIn PDF document text
    • https://bowukobi.weebly.com/uploads/1/3/4/7/134706413/16a4c389.pdfIn PDF document text
    • https://xepebujusu.weebly.com/uploads/1/3/4/3/134319702/560091.pdfIn PDF document text
    • http://tsuyopillar.com/assets/kcfinder/upload/files/51602033577.pdfIn PDF document text
    • http://sentidoseg.com/resources/original/file/84820265138.pdfIn PDF document text
    • https://wagalivo.weebly.com/uploads/1/3/0/8/130814328/9a635a1e3efd.pdfIn PDF document text
    • http://darelbachra.com/app/webroot/js/kcfinder/upload/files/12034643894.pdfIn PDF document text
    • https://radebijudowax.weebly.com/uploads/1/3/1/6/131607027/fac39c87ae3c.pdfIn PDF document text
    • https://zawiwiguxasawum.weebly.com/uploads/1/3/0/7/130739629/a1376.pdfIn PDF document text
    • https://lojejibat.weebly.com/uploads/1/3/4/8/134861033/sumozamugal.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1621caf7d030b9---22700477674.pdfIn PDF document text
    • https://ponukikoruxa.weebly.com/uploads/1/3/4/3/134343798/3542333.pdfIn PDF document text
    • 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_off00011e07.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00011e07.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13619 18788 bytes
SHA-256: 2e76f242fc956fb6e5b3376c4efb0dc3cc4687d8a40b18df36939dd9af657e52
font_02_sfnt_off0001659d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1659D 11208 bytes
SHA-256: e59420fb96e189d66390a406d304536678d2d733b902cab7b691af3da0005c05