PDF malware analysis — malicious · 72bb60471f52e885

MALICIOUS

PDF

74.7 KB Created: 2021-11-17 01:33:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-28

MD5: 6edbc37d70c5e3285b4761c0bcab2078 SHA-1: 264f93c121ce28134b9e36077b7c6cbd83bb80c0 SHA-256: 72bb60471f52e885c62307ad1db7a1a30ddfa274f42d515c7c7857da3b058870

156 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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
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.
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://krisoc.ru/uplcv?utm_term=study+guide+9+accounting+answers PDF link annotation
- https://gopherscopes.com/userfiles/file/23859217470.pdfIn PDF document text
- http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16182125266c3b---jevusekaf.pdfIn PDF document text
- https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/a3ced6130c2fba73648abdd4ddf9a06b/modajajibe.pdfIn PDF document text
- https://resulgame.com/calisma2/files/uploads/15673833394.pdfIn PDF document text
- https://dpengineers.info/admin/userfiles/file/tubarorededezibofumojetin.pdfIn PDF document text
- https://unitytradecapital.com/ckfinder/userfiles/files/52765501354.pdfIn PDF document text
- http://residencelesaline.it/userfiles/files/vizaniro.pdfIn PDF document text
- http://basumati.com/app/webroot/ckfinder/userfiles/files/vavozivil.pdfIn PDF document text
- https://polaria.cz/images/file/sajugapu.pdfIn PDF document text
- http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161698bada5027---wanusawutaze.pdfIn PDF document text
- http://limobebe.com/userfiles/files/40005626924.pdfIn PDF document text
- https://buyafranchise.org/files/files/rowalapanuwegejizanab.pdfIn PDF document text
- http://fgosvo.ru/files/files/vowizoruvomobuwazopuf.pdfIn PDF document text
- http://www.masozilina.sk/ckfinder/userfiles/files/lezugixoreponu.pdfIn PDF document text
- https://tractorpulling-emmeloord.nl/upload/file/bosewe.pdfIn PDF document text
- http://prefinancovaniehypoteky.sk/res/file/70280144589.pdfIn PDF document text
- https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/fec91c7a6ab06da61ab9b8608f3d795f/zelojixojab.pdfIn PDF document text
- http://livestocktool.com/d/files/rekolivulifosabazila.pdfIn PDF document text
- http://www.advokat.com/app/webroot/img/fck/file/jatib.pdfIn PDF document text
- http://offerparts.com/upload/files/domipobebemukora.pdfIn PDF document text
- https://mobisteelegypt.net/userfiles/file/43770100157.pdfIn PDF document text
- http://oikoscoccatoarchitettura.com/userfiles/files/zagabadep.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000bf41.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBF41	11044 bytes
SHA-256: `14b740d1daa7f5fac0fd1e627ed79d25a3690f78e294809fa20502dddfe58544`
`font_01_sfnt_off0000d900.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD900	16540 bytes
SHA-256: `45015263e28dbf00792e0fa83ae0fb9123af5110209f191c00797c49350166ef`
`font_02_sfnt_off0000f021.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF021	17220 bytes
SHA-256: `959ac08d8e42b665fa393e35f1ded470bb6c0c897e941f13bea07c4e25164484`

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