MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF file contains a large number of links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via a spearphishing attachment. No scripts were extracted, and the document body was unreadable, so the primary evidence comes from the URL heuristics and AV detection.
Machine Learning
- Nyx PDF Classifier malicious score 0.9951
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 http://sccsfz.org/upload/2021-09/sosube.pdf
- http://klpa.net/userData/board/file/gifosepowovokilet.pdf
- https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/4e34a97bde59553d92edec286b6f42f2/22640581263.pdf
- http://www.prodomasa.com/ckfinder/userfiles/files/lukavimafapaletejokubu.pdf
- https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/4dcbe01c1ee3b47b656cbbf52abc95bb/15488753873.pdf
- https://www.esfa.bg/root/ckfinder/userfiles/files/mebesoziwegonuxotekawe.pdf
- http://tehla.eu/userfiles/file/dinixemazuritedisuwuma.pdf
- http://pietroquatriniarchitetto.eu/userfiles/files/73389011758.pdf
- https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/6ce74c656ffc3364049fb752b320aa2c/20473041459.pdf
- http://tvsatkrosno.pl/userfiles/file/3231687945.pdf
- http://xmzhj.com/UserFiles/file/80958668383.pdf
- https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b17b2a9b2e---bilujasi.pdf
- http://gzmzwl.com/Uploadfiles/files/52066495672.pdf
- http://metalltechnik-kutschi.at/10300800996.pdf
- http://knipia.com/userfiles/file/66656802240.pdf
- http://adriennemason.com/assets/files/rabizanubarilevovu.pdf
- http://artetendasud.it/userfiles/files/61566091108.pdf
- https://akgoz.zemta.com/uploads/files/xevuzujegujenusaranifoxon.pdf
- https://777mto.org/contents/files/83344746215.pdf
- https://polenhosting.com/calisma2/files/uploads/nulirugisusuragesif.pdf
- http://parilka.by/var/upload/file/palosofumopagofix.pdf
- https://tutorsbureau.net/userfiles/file/zuxixub.pdf
- http://zulassungsdienst4you.de/bilder/file/52909400350.pdf
- https://fong-cai.com/upload/files/24291120498.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=admiral+casino+app+download
- 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_off0000b880.bin6e45ecd998de5473428c2f7aeb6a4241a7a4de7f03fd87098522a77607b6d87f |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB880 | 15884 bytes |
font_01_sfnt_off0000e0b3.bin2654bcec5d3dfffc645a7785cf55b672ee626f78942b3efc79e6ea54f2ac16b7 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE0B3 | 10512 bytes |
font_02_sfnt_off0000f897.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF897 | 16792 bytes |
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