MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the PDF functions as a link farm, with numerous URLs pointing to potentially compromised websites or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of multiple external URIs and link farm indicators strongly supports this attack pattern.
Machine Learning
- Nyx PDF Classifier malicious score 0.9908
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://chcial.ru/uplcv?utm_term=screen+mirroring+iphone+android
- http://888chji.com/userfiles/files/peludokikivuxe.pdf
- http://hrdiborice.cz/erucom1/files/files/46695571829.pdf
- http://alwaysshine.com/fileimage/file/84475819766.pdf
- http://al-bandak.com/userfiles/file/lipurasiko.pdf
- http://pnlestari.com/visitbali/image/files/16036989134.pdf
- http://mgrima.com/files/file/raxuputezufe.pdf
- https://pellevah.com/upload/files/wexalagenexabo.pdf
- http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613a7967c2f4f---53903223663.pdf
- http://marcobernini.it/userfiles/files/midefutibubowu.pdf
- https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/16137c802d3539---72603216820.pdf
- http://cristal-in.fr/userfiles/file/31993749572.pdf
- http://oreade-breche.fr/userfiles/file/jujoxupunalir.pdf
- https://evrenmentese.com/upload/ckfinder/files/guzikagizukapazo.pdf
- http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fb3cf80c0b---98622085415.pdf
- https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/d29cda7a18e1450f32ac88d6fccd164e/71100698223.pdf
- https://flomogroup.com/upload/files/23408681910.pdf
- http://varosom.hu/userfiles/files/90310943695.pdf
- http://hongdanhaudio.com/luutru/files/21397783965.pdf
- http://oguraclutch.cn/uploadfile/files/11288659976.pdf
- http://www.startbatteries.gr/ckeditor/ckfinder/userfiles/files/15140759966.pdf
- http://chapraptti.org/userfiles/file/kewunemidifuwaxoj.pdf
- http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613460f6ee489---60441349069.pdf
- https://franciscovalles.comtraining.cl/userfiles/files/51763524900.pdf
- http://1-cities.com/blog_images/blog_/file/9712633259.pdf
- https://xn--fct5g39pjpo.tw/upload/leakstop/files/tunuwuseful.pdf
- https://renebeumer.nl/userfiles/file/gumariro.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_off0000bf0a.bin8b6563f472d9dc02ca4d0a7dba86bdecd15cc3459eb37e55da8ffa6514e67547 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xBF0A | 17028 bytes |
font_01_sfnt_off0000ea5c.bin9d8405027004150a5d2827e5c24f00dd20a725b068451ba99a8fb9a17b0a2be8 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEA5C | 10724 bytes |
font_02_sfnt_off00010283.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10283 | 16792 bytes |
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