PDF malware analysis — malicious · 4e3d18af4af3e1a0

MALICIOUS

PDF

85.1 KB Created: 2021-06-25 23:53:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-19

MD5: b261985086e6e2c8e175a3c9e288d440 SHA-1: 21de889c5c5b38cafaaf6e183b9bb82154667685 SHA-256: 4e3d18af4af3e1a02868b38b278d9bbfcd88b4c3f60ed27290359d86d2278cc4

164 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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 http://centralcogtc.com/uploads/file/37360058020.pdf In PDF document text
- http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6fb9171004---49721413283.pdfIn PDF document text
- http://manixcnc.com/ckupload/files/pebejanutaleboweviso.pdfIn PDF document text
- http://benedictinoselrosal.org/ckfinder/userfiles/files/luvarofufibewuwuwimapefa.pdfIn PDF document text
- https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/e783f27b64999058d4c382913618a492/40787027950.pdfIn PDF document text
- https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608da1919ff93---medibowekov.pdfIn PDF document text
- https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/bo38lmkq6psdjirhjsguobaplp/nudimavexowujoravanib.pdfIn PDF document text
- http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16091f6729ed1a---basimidib.pdfIn PDF document text
- https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083e0c40857a---86420970756.pdfIn PDF document text
- https://cjsc.se/ckfinder/userfiles/files/9195461038.pdfIn PDF document text
- http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d44d28e7c---86639816447.pdfIn PDF document text
- http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/a8d47468b5aede4191805a6c2cf2e13c/gasatuzol.pdfIn PDF document text
- http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6d96e83e7---gutututibavesozokadaduza.pdfIn PDF document text
- https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160753e2b7d3cc---43672533729.pdfIn PDF document text
- http://webinside.pl/userfiles/file/99207012981.pdfIn PDF document text
- https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/bv4q0rrorpusg65j34ivqn9nrj/20974889179.pdfIn PDF document text
- http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093d2648dcdd---23077286816.pdfIn PDF document text
- https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/895d83d1736e2e9d27f440149170c2f0/gowajizinorev.pdfIn PDF document text
- http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16090f753493a0---dajegal.pdfIn PDF document text
- https://nhanloc.net/userfiles/file/63483061434.pdfIn PDF document text
- http://benardoutlite.com/admin/fckeditor/fckdata/file/80781760089.pdfIn PDF document text
- https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/q8qearteqp0soqdlebnl0k1ies/pijesazelirar.pdfIn PDF document text
- http://wallacewilliamsfamilyreunion.net/clients/6/66/662ca4338cd1fa41fa93b88222973dc6/File/pobipomuxa.pdfIn PDF document text
- http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607615f57ab4a---benuwugesimopawuxupela.pdfIn PDF document text
- https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b6277b320---45313186777.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=ready+player+one+audiobook+free+downloadPDF link annotation
- 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_off0000e9f8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE9F8	16944 bytes
SHA-256: `74ac6f6dbe453ab49a89fb82bea643bf6ffb4fa372519047e72bf99339f3d4cd`
`font_01_sfnt_off00011622.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11622	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012e39.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12E39	10804 bytes
SHA-256: `9b5a3052406df0535ad8e278956a4a179b668979d32ab261881e489b6b865723`

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