MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, lacking clear user-facing text but containing structural elements indicative of a malicious PDF.
Machine Learning
- Nyx PDF Classifier malicious score 0.9995
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARMPDF 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.
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Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARMSmall 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.
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External URI info PDF_URIPDF contains an external URL action
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Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTALThe 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.
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Embedded URL info EMBEDDED_URLOne 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=an+example+of+autonomy
- http://muzycznescyzoryki.pl/userfiles/file/bovipoberesezufokoro.pdf
- http://supermarketdv.ru/files/file/98077711939.pdf
- https://hohsingfiber.com/ufiles/files/69161155921.pdf
- https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b9606f2eb2b---51748455764.pdf
- http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a14c704df8---nabobixevomakuxe.pdf
- https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/a8025279c230455d68f8043bd10f64ea/deselasuxedosozexugi.pdf
- https://hssanesteban.cl/files/joluvisijedi.pdf
- http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607df3d45079e---nupuz.pdf
- http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16081590876b89---76802511501.pdf
- https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/4ac4ee2fb9935f98b9d009795eb751ce/20680386148.pdf
- http://studiodugnani.it/userfiles/files/12895963705.pdf
- http://elesi.eu/fichiers/files/begisezawufabemanof.pdf
- http://ottotech.center/userfiles/file/2834467183.pdf
- http://kenshopvn.com/uploads/files/derusefafu.pdf
- http://xn--9n2bn9mz3aba29g44r4o0a.kr/fckeditor/userfiles/image/49923581242.pdf
- http://mitcostruttori.it/userfiles/files/jivelunuweraxemevunevopas.pdf
- http://micronforgacsolo.hu/UserFiles/file/87040704797.pdf
- http://world-spa-resorts.com/dok/sinikekobozowot.pdf
- http://ascensionchina.com/userfiles/file/21205304743.pdf
- http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e7b89dc67---49714948702.pdf
- http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4d32e2efa---40070675509.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000e178.bin10747df68053403ae4e9cd8e1a10e83d83dc1f50f22793b1f208eb7858162ef7 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE178 | 10456 bytes |
font_01_sfnt_off0000f94a.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF94A | 16792 bytes |
font_02_sfnt_off0001115c.bin1f9b6811cf32de6d613fb82e8024be4d0ec64510220fa34b334ecb101d8d0a50 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1115C | 15992 bytes |
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