MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to numerous external URLs hosted on compromised WordPress sites and disposable domains. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM firings strongly suggests the document is designed to lure users to potentially malicious websites, likely for phishing or malware delivery.
Machine Learning
- Nyx PDF Classifier malicious score 0.9970
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://catamma.ru/uplcv?utm_term=superlative+comparative+pdf
- http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614376719d9ab---jufulamotogura.pdf
- http://xn----7sbezcba9a5aggb3j.xn--p1ai/ckfinder/userfiles/files/wusalutinuse.pdf
- http://market-oborudovanie.ru/upload/file/pilowesisixivu.pdf
- https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/f782ef8187258fa6784ddaf854e99e55/51044931452.pdf
- http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16143b5653f1ee---jobotigezosuzo.pdf
- http://gzcaifeilai.com/ckfinder/userfiles/files/202109051230251984.pdf
- http://stellarp.com/userfiles/files/16550860330.pdf
- http://vietkinggroup.com/uploads/userfiles/file/zegikeguzawanas.pdf
- https://bompentax.com/quangbasanpham/app/webroot/upload/image/files/99093118554.pdf
- http://svb-volleyball.de/userfiles/file/bomoreme.pdf
- http://sevoir.hu/uploads/file/xizamokuzede.pdf
- http://safarang.com/basefile/files/fomat.pdf
- http://ferrocom-spb.ru/userfiles/files/riwexukazupuvikon.pdf
- https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd73fd0fdb---gokakewizujaneliseke.pdf
- http://homeshopeez.com/uploaded_files/userfiles/files/95106947335.pdf
- https://taxfirma.com/userfiles/file/32747728244.pdf
- https://keralahappyjourney.com/ckfinder/userfiles/files/71387469876.pdf
- https://divanich96.ru/admin/ckfinder/userfiles/files/87147054767.pdf
- http://www.verneteco.com/ckfinder/userfiles/files/4515934769.pdf
- http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130c4259588c---sidez.pdf
- http://gintaras.cz/userfiles/file/310279023.pdf
- http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/161354f9844150---wubapiwerokol.pdf
- https://koparieshorvathbusz.hu/files/file/tanivovi.pdf
- http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f0bc63ad11---tenol.pdf
- 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_off0000fd8f.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFD8F | 16792 bytes |
font_01_sfnt_off000115a6.bin9e9d300b975bcddcc60ca429c7d7348ea031799f4157fe30de55e62c6111952e |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x115A6 | 10748 bytes |
font_02_sfnt_off00012e6a.bin4c5863fc6131cb1d6488689c32e32901202039153f5e97802d0d5ab9a0fff117 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12E6A | 18848 bytes |
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