PDF malware analysis — malicious · 4e3990dd6a0f5a73

MALICIOUS

PDF

76.1 KB Created: 2022-04-06 01:41:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-19

MD5: b855883f4b0a658ae80fc1e71d03985b SHA-1: 0dca089641a392a8cc02224d190f76e52407aaba SHA-256: 4e3990dd6a0f5a73966535c05931b1a86e53be5036d35eddd107a82bf551bb61

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://cafij.co.za/YmrXLWy8?keyword=solving%20polynomial%20equations%20using%20quadratic%20formula%20calculator PDF link annotation
- https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16239a9688c903---11387115092.pdfIn PDF document text
- https://vikuwavek.weebly.com/uploads/1/3/4/5/134506456/1411877.pdfIn PDF document text
- http://tarotschule-stuttgart.de/sites/default/files/file/rupipi.pdfIn PDF document text
- https://naputurezakir.weebly.com/uploads/1/3/4/4/134485320/didenevuwesageruj.pdfIn PDF document text
- http://ehomerealestate.org/images/file/fevovagazanoxisolodugija.pdfIn PDF document text
- https://womubunu.weebly.com/uploads/1/4/1/2/141281740/lapalunita-vumebatosex-dijaz.pdfIn PDF document text
- https://drjou-vc.com/upload/files/31191221125.pdfIn PDF document text
- https://wuvufirow.weebly.com/uploads/1/3/4/3/134370386/fa33ab655a3.pdfIn PDF document text
- http://martonfogtechnika.hu/admin/kcfinder/upload/files/gokagadiritaruber.pdfIn PDF document text
- https://jodeliloku.weebly.com/uploads/1/3/5/9/135975589/b1dee48bde20.pdfIn PDF document text
- http://www.albertoabajolimousin.com/abm/Bibliotecas/kcfinder/upload/files/zijupazokuvisanizof.pdfIn PDF document text
- https://gizumefelaz.weebly.com/uploads/1/3/4/3/134318195/3154890.pdfIn PDF document text
- https://letimetijomez.weebly.com/uploads/1/3/1/4/131454560/8540981.pdfIn PDF document text
- https://fodugivatixa.weebly.com/uploads/1/3/4/5/134501687/f19f9a152f.pdfIn PDF document text
- https://divinehm.com/ckeditor/kcfinder/upload/files/96115267291.pdfIn PDF document text
- https://fisezofibidan.weebly.com/uploads/1/3/4/3/134316577/lavumebaju_gekasuzapilab_kizinuliro_sezewatufu.pdfIn PDF document text
- http://artanuji.ge/admin/ckeditor/ckfinder/userfiles/files/dokijiw.pdfIn PDF document text
- https://tunoritusaw.weebly.com/uploads/1/3/5/3/135328070/7098855.pdfIn PDF document text
- https://www.procotech.be/ckeditor/kcfinder/upload/files/77770965324.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_off0000bc77.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBC77	11464 bytes
SHA-256: `c9f1a14704523bb863dfc23c158866b3449b080fa9d90cff9b9184a51beabb6f`
`font_01_sfnt_off0000d712.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD712	18404 bytes
SHA-256: `9863c77d8cb728cdf11297d18ea5ad32b32196579ad15d05fb70cb251b389566`
`font_02_sfnt_off00010814.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10814	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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