Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ddf83452dff77aa…

MALICIOUS

PDF

68.9 KB Created: 2021-12-09 06:54:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-26
MD5: 7e5965ed18ce78c68acbe1223e8ef42c SHA-1: 9ba16edb3030f63659f0cd0a735b62b4f3b179ca SHA-256: 3ddf83452dff77aa64dee636505f8d8f476b26352f58b1233bf14ea58dfff1bc
164 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://infrive.ru/uplcv?utm_term=cisco+firepower+2100+licensing+guide PDF link annotation
    • http://pvvc.cz/files/vogeganawizigi.pdfIn PDF document text
    • http://vamaconsulting.sk/userfiles/file/kuvavirezisoranebewapawot.pdfIn PDF document text
    • https://uetty.xyz/js/ckfinder/userfiles/files/wanilufogagitiguzu.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161a895ca1e5f2---jewirukon.pdfIn PDF document text
    • https://www.wizzfizz.com.au/application/third_party/ckfinder/userfiles/files/34343525251.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1617a4b389e098---86289703838.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/057f240d0e91304e977d50146f3152dc/kukojeni.pdfIn PDF document text
    • https://helicopterleasingservices.com/userfiles/files/kupoka.pdfIn PDF document text
    • http://seasplendorpetro.com/userfiles/48913325160.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/koliliwerelakefud.pdfIn PDF document text
    • http://vlajamo.cz/images/file/rekebemigej.pdfIn PDF document text
    • http://qardia.com/uploads/3580443708.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161a003395cb6d---12181982680.pdfIn PDF document text
    • https://aayams.com/userfiles/file/36312427219.pdfIn PDF document text
    • https://wiltech-hk.com/editor_upload/file/9822156474.pdfIn PDF document text
    • https://hilanguage-com-tw.triangle-design.com/files/punefupixaj.pdfIn PDF document text
    • https://slezanie.eu/userfiles/file/52419620081.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/1fa63d5b2507264eebf9c702af6c5834/97527153407.pdfIn PDF document text
    • http://bankerz.in/qpic/files/galitexuj.pdfIn PDF document text
    • http://vinhomescaurao.info/app/webroot/img/files/vefepidime.pdfIn PDF document text
    • http://swhwsolution.it/ckeditor-ckfinder-integration/uploads/files/jujetexifutemazijuxumo.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd59392997---68063985902.pdfIn PDF document text
    • http://miroslaws.com/ckfinder/userfiles/files/ritutotuwamelaluvekax.pdfIn PDF document text
    • http://usatovl.ru/upload/fckeditorfile/dumevinopanarediseta.pdfIn PDF document text
    • http://evrofurnitura.by/elax-furnitura.ru/uploads/files/69570484178.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 PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aa69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA69 16608 bytes
SHA-256: 9471127fadfdff83220c4861c38616d29e24af5f4bc14b04ea052fb0289a276b
font_01_sfnt_off0000d57d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD57D 11048 bytes
SHA-256: 481e998e354635002249f6a6438089190e7c4b0252e870e4d447a5c2534ac22e
font_02_sfnt_off0000ef3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3D 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336