Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb88d3eabfdd0d77…

MALICIOUS

PDF

76.2 KB Created: 2022-04-13 13:19:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-08
MD5: f5090d85ac0fde814bbd7de21684c023 SHA-1: 0786d4aef2b11d9eabef4d0c7aa5dffb3265dd4a SHA-256: cb88d3eabfdd0d775eb7e669e7258875f9365ef928502d684ec0b562ed6a2097
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mkycc4.com/kycc4.com/userfiles/files/11416841593.pdf In PDF document text
    • https://wagemerefav.weebly.com/uploads/1/3/2/7/132712282/badaxupage.pdfIn PDF document text
    • https://kanoritixuvu.weebly.com/uploads/1/3/4/8/134874131/4790079.pdfIn PDF document text
    • https://tozusasulinun.weebly.com/uploads/1/3/4/8/134872335/7686039.pdfIn PDF document text
    • http://prime42.ru/userfiles/files/wuzureweroxudevojis.pdfIn PDF document text
    • http://uslugi-ogrodnicze.pl/pliki/File/24527825722.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/697582.pdfIn PDF document text
    • https://fewidatemuvej.weebly.com/uploads/1/3/4/2/134266352/1216b6be7b.pdfIn PDF document text
    • https://megidawuxuta.weebly.com/uploads/1/3/4/7/134729580/xuxada.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1622aaf537619a---78817014260.pdfIn PDF document text
    • https://lezanixopedem.weebly.com/uploads/1/3/4/8/134886347/61d9172f3c.pdfIn PDF document text
    • https://xurigaguk.weebly.com/uploads/1/3/4/6/134635426/8212522.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1621cd30d829f9---zuvusojiduxez.pdfIn PDF document text
    • https://jabenawonidibe.weebly.com/uploads/1/3/5/3/135385032/5959665.pdfIn PDF document text
    • https://powofowus.weebly.com/uploads/1/3/4/5/134583567/f109fff8ae.pdfIn PDF document text
    • https://probidjp.com/ckfinder/userfiles/files/20220215_101723.pdfIn PDF document text
    • https://davaocarrental.com/images/file/xobunebisos.pdfIn PDF document text
    • https://fecuq.co.za/YmrXLWy8?keyword=never%20fade%20movie%20the%20darkest%20mindsPDF link annotation
    • https://www.amata.org.uk/ckfinder/userfiles/files/bokor.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_off0000c5f6.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000c5f6.bin)

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5F6 10708 bytes
SHA-256: 7b810f6525c91d30358a15eeae1cd6055cb21af8651763acf3120f76e12608fb
font_01_sfnt_off0000de60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE60 17084 bytes
SHA-256: ddcea08578c3fe1aafa5f16ba29723539a0472746e09061075fee4c5903962fc
font_02_sfnt_off00010b38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B38 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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