PDF malware analysis — malicious · c25321172fb73bd8

MALICIOUS

PDF

90.1 KB Created: 2021-06-27 19:42:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05

MD5: e1d9ea0c7ab9aeff19cc736f3bb09c14 SHA-1: 0d9df9c90edd153f648f73c4ab26b5938c8076a1 SHA-256: c25321172fb73bd887e81a979add7f4c460856d66667776bb6772f9c29ebf969

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains numerous links pointing to external websites, many of which appear to be compromised WordPress installations. These links likely serve as a link farm to distribute malicious content or facilitate phishing attacks. The ML classifier and ClamAV detection strongly indicate malicious intent, with the file being identified as Pdf.Phishing.Trojan.

Machine Learning

Nyx PDF Classifier malicious score 0.9964

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 http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a61fed87b---rabefesujarinit.pdf In PDF document text
- https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aab1b547063---49526201109.pdfIn PDF document text
- https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/3oadhgqbnlm2rh6d5t0v1fcb2j/9271080687.pdfIn PDF document text
- http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a83b425c09e---pebonutigasakuvememapir.pdfIn PDF document text
- https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/e3a8e35ae617ef780bd7bce9a8ccb770/73856998135.pdfIn PDF document text
- http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16091dacfa8d25---3841285527.pdfIn PDF document text
- http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4f9c15c5d---belidiwusabaf.pdfIn PDF document text
- https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/37cf28152289f7943694631a72f694a3/porizoriliden.pdfIn PDF document text
- https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca254e8f13---zedirujojanonazotela.pdfIn PDF document text
- https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cde3d1c7e63.pdfIn PDF document text
- https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160acb2a8427a2---wajiluniwixodorugiso.pdfIn PDF document text
- https://mobilieroccasion.fr/uploads/file/78596874561.pdfIn PDF document text
- https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/m32ugmsl844o6vu4bco0ipg9m9/87766835315.pdfIn PDF document text
- https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082eea44474b---nipenurasasafej.pdfIn PDF document text
- http://usarsenal.it/userfiles/files/61568770465.pdfIn PDF document text
- http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607bac0065833---83100910643.pdfIn PDF document text
- http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609a493a145f5---vebufaxasesumutogo.pdfIn PDF document text
- http://soft-pro.hr/upload/datoteke/9198877698.pdfIn PDF document text
- https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/mjc1mk0gksipj7ohge71490i70/45302632394.pdfIn PDF document text
- http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b56a4cb3c7---puzonejirinobot.pdfIn PDF document text
- https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/3b63d655b5c51744d0046307b03566ea/77190974146.pdfIn PDF document text
- https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/9micl9o5jqigjr5gs29m3fo5c0/21825716487.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=watch+pride+and+prejudice+zombies+online+freePDF 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_off0000f883.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF883	17656 bytes
SHA-256: `d7b510f5025de8a813ee0293d597c87ed1af4b323d71301f6d044e74c0a45a85`
`font_01_sfnt_off000126a9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x126A9	11308 bytes
SHA-256: `684886fe9322dfd5dfac78bc417833eb252065a8bc8514448a54ebe10548ec04`
`font_02_sfnt_off000140d8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x140D8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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