MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF contains a link farm pointing to numerous compromised WordPress sites and disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The document body is heavily obfuscated, preventing a detailed analysis of its specific content, but the presence of multiple external links and the heuristic firings are sufficient to infer a malicious purpose.
Machine Learning
- Nyx PDF Classifier malicious score 0.9942
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://cuakeobinhduong.com/upload/files/45697659149.pdf
- https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/1fb6916ed9dde3f55ac607e9cf4ba1df/toredemidone.pdf
- https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/65147f06fe61a6c890141822626e1656/37770559895.pdf
- https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/5937e81c85b89161e15139ec963c613c/80207740886.pdf
- https://wita.lt/images/files/5138322536.pdf
- http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b78b84ff6---10628141474.pdf
- http://web68s.com/upload/files/relusalubekeboloso.pdf
- http://whuntex.ru/userfiles/file/lewiwidoveg.pdf
- https://fresh-cherries.com/ckfinder/userfiles/files/97749631994.pdf
- http://deltastal.ru/userfiles/file/xatevapuxazugu.pdf
- http://hi-techfiber.com/userfiles/file/4186258134.pdf
- https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609034d186501---25355120651.pdf
- https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/b0e67f1b35505700b53e15f12a1a0721/pagukolojekimilaribudapab.pdf
- http://alanurturizm.com/rsm/files/74743105111.pdf
- https://africanresearchcenter.com/userfiles/file/33027115524.pdf
- http://begemot-rus.com/uploadfiles/file/2021051514285973499.pdf
- https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/luf59va4afa79ms0raap61nkv0/49599967780.pdf
- https://vyrukrc.lt/userfiles/file/82997078272.pdf
- http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2606970a29---tinarozefajawubene.pdf
- https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/7bme74hae8k8cmg5jukkd7a6mo/63304004262.pdf
- http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609841303cd64---56517353210.pdf
- http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbde3a5db83---zokufufelasivikum.pdf
- http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3ssi4hj0jc26dtp02gnjec1af5/kemevotekivo.pdf
- http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16078fcaa89a3c---zamonabif.pdf
- https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=rowenta+1550w+steamer+cleaning+instructions
- 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_off0000f6a9.bin48a8e6afb5e87c09ef011105ede72ef9f78576f43fcb26f8a09083205399f8ab |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF6A9 | 11112 bytes |
font_01_sfnt_off000110bd.bin2e491031bc8f31fb78e835510fa8b1fc87a0e3b54eb484f71c319eb8684e9335 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x110BD | 17908 bytes |
font_02_sfnt_off00013fea.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13FEA | 16792 bytes |
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