MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs that point to potentially compromised websites or disposable hosting, likely to redirect users to malicious content. The presence of multiple external URIs and a link farm structure strongly suggests an attempt to lure users to external sites.
Machine Learning
- Nyx PDF Classifier malicious score 0.9930
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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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://yuss.it/file/6934814480.pdf
- https://kimtuong.vn/isc/public/files/fckupload/file/31884313877.pdf
- http://yuhenganquan.com/userfiles/file/20210525203023_1448684709.pdf
- http://alfonsoguiggiarchitetto.it/userfiles/files/jibimo.pdf
- https://nnkcreations.com/userfiles/file/87231035526.pdf
- https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/c8f5fff00c886db288e678a5dbfaa092/98230552983.pdf
- https://aulacvn.com/upload/fck/file/fafiz.pdf
- https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/1l9dmg3ak1cv3im65b66bjlo4n/jujeka.pdf
- https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/4a3935387751ae1371be532d30e13bf2/xonikulepenovagudizote.pdf
- http://breakevenpoint.pl/uploads/editor/file/nejuwugitinekesutifires.pdf
- http://transfertrolley.cn/d/files/3660059920.pdf
- https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/8c41c1d8c548d7dbfc975039413a7c38/87267049720.pdf
- http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9cd29afe7a---metupezajovawemimuv.pdf
- https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3040879c2---11080212527.pdf
- https://marosme.ro/hirek/file/65403471905.pdf
- https://zionapostolicministries.org/uploads/file/45476871739.pdf
- http://rogersdesignhouse.com/uploads/files/fenojaloraveresidutuj.pdf
- https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5157038bcd22cef6d1fbd2b311ba02bc/823950059.pdf
- http://www.jindatunnel.com/up_files/file/21642126811.pdf
- http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160810b9688001---jopaxotememojutixidi.pdf
- http://reicar.dk/userfiles/file/subitelanomif.pdf
- https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a2128ecdf---5781612646.pdf
- https://zlatartopalovic.rs//files/rupitasofegifakilemojo.pdf
- https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=hey+meaning+in+english
- 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 4
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000d716.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD716 | 16792 bytes |
font_01_sfnt_off0000ef2d.binfac19baa0602ce90b38b06a03d223019f22c55380384208d448ee56b425b8e48 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEF2D | 10340 bytes |
font_02_sfnt_off0001062e.bin3e3a6eb4a94a86062d1794a105538c697cb622bf13df9fd7844786853fc7358c |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1062E | 1804 bytes |
font_03_sfnt_off00010eaf.bin9f2ca17768270854ca42f6927c74188aec0c0d1edb0f0bbe7df41988fa5212d8 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10EAF | 21608 bytes |
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