MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains numerous external links, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to distribute malicious content. The embedded JavaScript stream further indicates potential for malicious activity, likely to facilitate the download or execution of a secondary payload. ClamAV detection and ML classification strongly support a malicious verdict.
Machine Learning
- Nyx PDF Classifier malicious score 0.9977
Heuristics 7
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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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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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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 http://ct-tci.com/cttax/userfiles/files/1341682406.pdf
- http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/16138b83fdf648---31085291978.pdf
- http://gartenmessebau.de/uploads/files/xesinozezixo.pdf
- http://snsi.jp/image/news_file/15943700640.pdf
- https://888nv.ru/userfiles/file/buzemimegadunununameni.pdf
- https://maxlinder.com/admin/assets/ckfinder/userfiles/files/wadimejefififozemexe.pdf
- http://chanhungcorp.com/images/uploads/files/63288390092.pdf
- http://4998horo.gmmwireless.com/contents/files/80433739212.pdf
- http://denki-shonan.com/uploadsfile/femejexa.pdf
- https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/jtommra25a9ah2dlop02hdv7sc/99085345128.pdf
- http://joeun-it.com/userData/board/file/josamugidexevudoferoxeru.pdf
- https://www.sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/79720732319.pdf
- https://8cj2aja7-8mxb.com/contents/files/61409485377.pdf
- http://tbff-bygg.se/img/files/zasegejekowajapolugikiko.pdf
- http://skrutit-probeg.ru/upload_picture/file/webilori.pdf
- https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614319586c693---mezatelulopesipezagoradu.pdf
- http://xinshifm.com/userfiles/file/89006800717.pdf
- https://almudenafernandez.co/ckfinder/userfiles/Files/79168422283.pdf
- http://vietkinggroup.com/uploads/userfiles/file/zegikeguzawanas.pdf
- http://dulichtantai.com/files/uploaded/files/98497698012.pdf
- https://imad0c0.com/js/ckfinder/userfiles/files/tulonufobi.pdf
- https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/349ffaba77fa8928b192545cf711b9b0/jezezozuriviv.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=twin+lead+transmission+line
- https://tes-sys.com/uploads/ckfinder/files/20210906/16308823978794.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_off0000da7d.bin1ecb0524bcd6dee4a15df2a8ad8acc97f587e687d722844e848137285600f189 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDA7D | 17104 bytes |
font_01_sfnt_off0001065e.bin2bccab316dc2c9f1699016b3117dcea9ba1058043aa9de4df4609a14532a96fe |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1065E | 10456 bytes |
font_02_sfnt_off00011e21.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11E21 | 16792 bytes |
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