MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or initiating malicious actions. The presence of numerous external URIs, including those hosted on compromised CMS uploads and disposable hosting, suggests a link farm designed to redirect users. The ClamAV detection and ML classifier further confirm its malicious nature, likely as a phishing lure or a downloader for further stages.
Machine Learning
- Nyx PDF Classifier malicious score 0.9990
Heuristics 7
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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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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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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://krisoc.ru/uplcv?utm_term=le+comparatif+et+le+superlatif+exercices+pdf
- http://acpiindia.com/userfiles/file/fofisevewonudoxovovoxe.pdf
- https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/d679e6d15e5d473fae85b1eb056aad4b/96018943333.pdf
- http://phantasos.org/userfiles/file/mefexujogowiba.pdf
- https://thekolkatapackersmovers.com/ckfinder/userfiles/files/pusavupe.pdf
- http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160f2e56c36af6---97149591972.pdf
- https://ecotranslation.ca/upload/editor/file/1773697958.pdf
- http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608e206a09d79---lakosufatavimolap.pdf
- https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/bfqdncu9l60n25sp9j3n2vpa8r/salosuxovufelisiwajuju.pdf
- https://keluargamimpi2.com/contents//files/85459382581.pdf
- https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/c52098bcf93a752985e679bd6a2cccd9/76075778338.pdf
- https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee395eef5b---41776015936.pdf
- https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/imf251hqep9ncb0k6gj7vlns59/16008177643.pdf
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c346ef775---38814845777.pdf
- http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0726b35f8a---79616156540.pdf
- http://getem.eu/files/file/majeroduk.pdf
- http://s8radziejowice-paszkow.pl/userfiles/file/gitedezarodefus.pdf
- https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/4aee64f3aa8382adcd0d8e2edf2d04d6/64350045912.pdf
- http://stellamaris.cz/userfiles/finuvupetubusedorese.pdf
- http://epoch-making.jp/js/upload/files/lowafunanokozi.pdf
- https://ewt.cz/res/file/domisodakiziwov.pdf
- http://xiaohecollege.com/d/files/89915160445.pdf
- https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/c91a0eb0349d7724f01561854494c8b5/44006396852.pdf
- https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eff4cce24cd---tevujilemo.pdf
- https://museos.comarcadelasierradealbarracin.es/ckfinder/userfiles/files/xexibuwosowix.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_off0000ed1f.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xED1F | 16792 bytes |
font_01_sfnt_off00010531.bin0d2a846d259ed1c067e78cf7cf2578ef03d4a68592239b0ee80545b1de251a28 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10531 | 17860 bytes |
font_02_sfnt_off00013232.binbe145c362f744165260adc2c37b4d10d00e9b5a740046fcb19c6f6ec7edf6c4e |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13232 | 10836 bytes |
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