Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb855d8854d31cde…

MALICIOUS

PDF

67.1 KB Created: 2022-04-26 12:32:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-08
MD5: eed451115e91f7c90e97b17588c28655 SHA-1: c33207a77a27cb2924e802bdddde642d6a81f990 SHA-256: cb855d8854d31cdec08197bd33344d7ec62e1f2767348826c7e9f773e81543a2
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9851

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
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://tupobufilu.weebly.com/uploads/1/3/5/3/135310482/xasizenogoxorevut.pdf.
  • 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://colod.co.za/YmrXLWy8?keyword=how%20to%20charge%20black%20and%20decker%20350%20amp%20jump%20starter PDF link annotation
    • http://goksirkrupskimlyn.pl/img/upload/files/xagubapujetaraxukakul.pdfIn PDF document text
    • http://www.colfacor.org.ar/administrador_web/kcfinder/upload/files/9366021295.pdfIn PDF document text
    • http://topas.lt/userfiles/file/74878738739.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/162276366d473f---wedofipizoged.pdfIn PDF document text
    • https://gatheritup.com/js/kcfinder/upload/files/92181035561.pdfIn PDF document text
    • http://dgelc.com/userfiles/file/20220417101939.pdfIn PDF document text
    • https://tupobufilu.weebly.com/uploads/1/3/5/3/135310482/xasizenogoxorevut.pdfIn PDF document text
    • https://www.ekometal.com/kcfinder/upload/files/paverupobikekakebajaf.pdfIn PDF document text
    • https://muxojuwarerufi.weebly.com/uploads/1/3/5/3/135388895/jigimelokup.pdfIn PDF document text
    • http://tctrack.vn/images/newtech/files/gelajudodilakopu.pdfIn PDF document text
    • http://hoilhpnqbthanh.com/upload/file/salotan.pdfIn PDF document text
    • https://lijovewese.weebly.com/uploads/1/3/7/5/137505150/4235496.pdfIn PDF document text
    • http://www.leposeur.fr/site/upload/ckfinder/files/43747537533.pdfIn PDF document text
    • http://servis-hradec.cz/files/file/popabijewawo.pdfIn PDF document text
    • http://fmmvn.net/userfiles/files/wajukazotebubokudosurib.pdfIn PDF document text
    • http://handgun.ee/media/file/88113446399.pdfIn PDF document text
    • https://criderweb9.com/userfiles/files/zotadalozinoxaj.pdfIn PDF document text
    • https://mannlicher.hu/admin/kcfinder/upload/files/5111290890.pdfIn PDF document text
    • http://ceramicaartisticamarsalese.it/userfiles/files/56065309471.pdfIn PDF document text
    • https://vusosoxonefe.weebly.com/uploads/1/4/1/5/141510333/gilotedonuterotebob.pdfIn PDF document text
    • http://autoset66.ru/admin/ckfinder/userfiles/files/82091488305.pdfIn PDF document text
    • https://houseofwax.eu/kcfinder/upload/files/laviwovitavoku.pdfIn PDF document text
    • http://magischtheater.nl/userfiles/file/82948037060.pdfIn PDF document text
    • http://someteme.com/archivos/_20220410092750.pdfIn PDF document text
    • http://sadovoemkdou7.edu26.ru/files/files/86152322136.pdfIn PDF document text
    • https://fceresources.com/ckfinder/userfiles/files/82848743958.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_off00009f8a.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00009f8a.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009f8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000b7a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7A1 11836 bytes
SHA-256: b6a3acc8723c9f530c497aadd2417830f7838746032340cf707bf0f1bc5ccf70
font_02_sfnt_off0000d378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD378 16524 bytes
SHA-256: 30637e16afb979359990adb62e1c1e3ce572adc4ade6cbc7cecca942941ae860