MALICIOUS
196
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains a 'Browser extension / update installation lure' heuristic, indicating a social engineering attempt to trick the user into installing unwanted software. The document also contains numerous URLs, some pointing to compromised CMS upload storage, suggesting it is part of a larger phishing or malware distribution infrastructure.
Machine Learning
- Nyx PDF Classifier malicious score 0.9973
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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Browser extension / update installation lure high SE_BROWSER_INSTALL_LUREDocument tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
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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://supermovi.com/userfiles/files/90984987453.pdf
- http://bjsixiang.com/jingkelun/userfiles/files/20210917011052.pdf
- http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/60749851474.pdf
- https://sacc-la-chaux-de-fonds.ch/fichiers/file/fidojogufojixewufuvetawaf.pdf
- https://ln80.cn/filespath/files/20210918170504.pdf
- http://er-trans.com/img/produkty/files/62276879504.pdf
- http://borneneskontor-landsforening.dk/userfiles/file/jisokujupumo.pdf
- http://lg-palette.com/upload/files/36590164647.pdf
- https://erdemlerkoleji.com/resimler/files/43191076449.pdf
- http://sportservistocik.cz/UserFiles/File/juputomazatogitox.pdf
- http://woodbridgeabw.com/uploads/files/dagufuramiroremotesenuwil.pdf
- https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614123a958dbf---37238511509.pdf
- http://gizmakina.com/depo/sayfaresim/file/gugiziwusalasumarobodo.pdf
- https://hongmao.tw/uploads/files/202109112114542520.pdf
- http://ecohouse-lab.com/userfiles/file/43518157093.pdf
- https://cfi-registration.amyhalter.com/buzzboxgift/img/userfiles/files/62496716720.pdf
- https://yifff.se/userfiles/file/22579093030.pdf
- http://www.singchai.co.th/ckfinder/userfiles/files/sikavubo.pdf
- https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/f633d9dc058a6bcf8b3ae00386783508/vekutoxoxixowod.pdf
- https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/kambgfd8luf9m8aep04hlbefn0/83383944620.pdf
- http://birkhoffhi.com/userfiles/files/jalufogexutisaluzu.pdf
- https://huaku3c.tw/uploads/files/202109130415496440.pdf
- https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/4ca23a6d69f590b9a582c70882caa4a0/letijuxavuxuguluparir.pdf
- http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130e6ac7d09f---nasovitawiw.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=recchat+imo+call+recorder
- 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_off0000ca29.bina18bc8a5914e27f40c27ef80eb0a8b435e8f02ce811126da812957c98ee79277 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCA29 | 17208 bytes |
font_01_sfnt_off0000f709.bin8a2f1c6896eb18c5a46921be5993c61d42dd5ec1347336b17ec1bb947c191177 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF709 | 10408 bytes |
font_02_sfnt_off00010e99.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10E99 | 16792 bytes |
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