MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to domains flagged as compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, providing no direct user-facing content but likely serving as a container for these malicious links.
Machine Learning
- Nyx PDF Classifier malicious score 0.9986
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 https://medsplus.us/admin/images/file/wujaxofisetolawelew.pdf In PDF document text
- http://sdes.in/uploads/31105113800.pdfIn PDF document text
- http://balone.net/_upload/file///xogagefafisebagabivat.pdfIn PDF document text
- http://www.jucadent.es/ckfinder/userfiles/files/rowivowibuvuromex.pdfIn PDF document text
- https://liur-krd.ru/userfiles/file/komit.pdfIn PDF document text
- https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/7958b29bf3ed59e624c6c9f2b84624ff/kusazasex.pdfIn PDF document text
- http://nitexprofi.cz/userfiles/file/fuwox.pdfIn PDF document text
- https://lidiyageorgieva.com/ckfinder/userfiles/files/47502061003.pdfIn PDF document text
- http://www.hausbaumesse.at/ckfinder/userfiles/files/pexilewefulepixazu.pdfIn PDF document text
- https://rougezenekar.hu/files/file/93306930094.pdfIn PDF document text
- http://ccsup.co.th/uploads/ckfinder/files/lokeliruvapanezobul.pdfIn PDF document text
- https://rafautama.com/uploads/file/bevupigafijivujunal.pdfIn PDF document text
- http://philipsphotographystudio.com/16244208686.pdfIn PDF document text
- http://klubbelgickychobrov.sk/editor_uploads/files/romosugunuvaparuriwezig.pdfIn PDF document text
- http://mdknoodles.co/uploads/files/mujebud.pdfIn PDF document text
- https://mauspro.net/upload/files/23334505353.pdfIn PDF document text
- http://pc580.cn/upload_fck/file/2021-9-9/20210909172005967086.pdfIn PDF document text
- http://bestorkate.com/uploads/ckeditor/files/93945809681.pdfIn PDF document text
- https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d9f49d72c2---51510946581.pdfIn PDF document text
- https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/tjsuuglno0332046ps3apl5f1c/41447238357.pdfIn PDF document text
- http://soosanfix.com/upload/fckeditor/file/61387868874.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=is+wrongly+a+wordPDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000b783.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB783 | 16308 bytes |
SHA-256: 2bf83398a396cdd8e295b412e32a85d7ef1dac08669f53221d7c166fe63a85d9 |
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font_01_sfnt_off0000e0fa.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE0FA | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off0000f911.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF911 | 10252 bytes |
SHA-256: 3810c6427fc32afdd7b14be0c5c7660d70ed6c07ecc1576d59becca0d9a7962f |
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