Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb840ac15231d7f2…

MALICIOUS

PDF

76.7 KB Created: 2022-04-04 00:42:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-09
MD5: ffe91eda7c4843579b99b9cc43209152 SHA-1: b5994f5e2ec83e24fd1fe0f7498a4fac10803612 SHA-256: cb840ac15231d7f2f3aa60750a8925c21932845b4d3a61293a8c6624cfb8fca6
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://yoyep.co.za/YmrXLWy8?keyword=briggs%20and%20stratton%2035%20hp%20vanguard%20oil%20type PDF link annotation
    • http://rydelko.eu/userfiles/file/senutu.pdfIn PDF document text
    • https://xevexafof.weebly.com/uploads/1/4/1/2/141260484/bisubasepajedas-nobozodiva-kewagiv-tevip.pdfIn PDF document text
    • https://xakivemo.weebly.com/uploads/1/3/0/7/130739368/1379624.pdfIn PDF document text
    • https://www.milestonesmn.org/ckfinder/userfiles/files/josiruwoduma.pdfIn PDF document text
    • https://kujepilam.weebly.com/uploads/1/3/5/3/135343620/wasara.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/7dbfbc29189e090080a876b6409dfea5/28714938262.pdfIn PDF document text
    • https://bankkartya.hu/js/ckfinder/userfiles/files/kijexigivopamuvov.pdfIn PDF document text
    • https://pilogowizimofog.weebly.com/uploads/1/3/4/6/134604263/gilam.pdfIn PDF document text
    • https://fekanarikivokil.weebly.com/uploads/1/3/4/8/134884633/kefavadejexavu-saxafeg.pdfIn PDF document text
    • https://vadigonisap.weebly.com/uploads/1/3/4/0/134095954/guxibosojevazerebi.pdfIn PDF document text
    • http://siamsankyo.com/Uploads/file/17679865988.pdfIn PDF document text
    • https://lolefisad.weebly.com/uploads/1/3/5/3/135344485/2961433.pdfIn PDF document text
    • https://sulipebi.weebly.com/uploads/1/3/0/7/130739254/4393065.pdfIn PDF document text
    • https://rugexosijebup.weebly.com/uploads/1/3/4/0/134017508/f4d41a2.pdfIn PDF document text
    • https://finutobinito.weebly.com/uploads/1/3/1/4/131406284/sorupiwegepubub_raferadibuvegil_xonuduwifagixe.pdfIn PDF document text
    • http://reedleisureproducts.ca/site-uploads/66735434308.pdfIn PDF document text
    • https://befufagu.weebly.com/uploads/1/3/1/3/131384284/nelamaguboxuvej.pdfIn PDF document text
    • https://ripulufixi.weebly.com/uploads/1/3/5/3/135388512/mizasumenu-tusavivuzemusol-jupumurorufezuj-raliwuki.pdfIn PDF document text
    • https://vigasobokaj.weebly.com/uploads/1/3/4/6/134619364/ffb3b954.pdfIn PDF document text
    • https://fuzidofan.weebly.com/uploads/1/3/2/6/132695445/sisowozax.pdfIn PDF document text
    • https://vujezogovi.weebly.com/uploads/1/3/5/3/135348950/zaxujuwolulusu_fisamukileme_jitiboki_jatisi.pdfIn PDF document text
    • https://gepepokomireke.weebly.com/uploads/1/3/4/8/134892048/e72d36c52f.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_off0000c4f0.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000c4f0.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F0 11308 bytes
SHA-256: 77dea1f8ecb37cab9532295ee2aafe54ced7a3ac2049e094e53e7703f8159155
font_01_sfnt_off0000df5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5B 17240 bytes
SHA-256: ab4a59c5351a827d03aad2fffdb13eefcf45a0f71d1e7956f1cd7e3ac64f2268
font_02_sfnt_off00010c9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1