MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample is identified as malicious by ML classifiers and ClamAV, with high-confidence heuristics indicating embedded JavaScript and a link farm. The embedded JavaScript likely executes malicious actions, and the numerous external URIs, including those hosted on compromised CMS uploads, suggest a phishing or malware distribution scheme. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this, indicating attempts to obscure the final malicious destination.
Machine Learning
- Nyx PDF Classifier malicious score 0.9833
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://pistant.ru/uplcv?utm_term=hx+stomp+owners+manual
- http://immodraft.de/images/architekten_agentur_images_/file/57991234262.pdf
- http://220-wm01.netdbhosting.com/file/zaxexowe.pdf
- http://gevenschoenen.nl/ckfinder/userfiles/files/bafidodarilowavigi.pdf
- https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/91vep6g71r2jit0kq1o55iac9g/21512422016.pdf
- http://starma.pl/files/file/1926939019.pdf
- http://ikuma-car.com/js/upload/files/vevisapurasaserekosi.pdf
- http://osingenieria.com/images/admin/file/4114454880.pdf
- http://kryotherapie.net/neu/userfiles/file/58623542652.pdf
- http://greenflameenergy.com/userfiles/file/98793185733.pdf
- http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614165fdd109e---nuzuka.pdf
- http://stigstudiotecnico.it/userfiles/files/8590558592.pdf
- http://idcla.net/upload/files/69242893966.pdf
- https://oxi-dental.ro/imagini_ws/74520363264.pdf
- http://vinaaquachem.com/uploads/files/98062898786.pdf
- https://wyslijpaczki.pl/app/webroot/files/userfiles/file/jebogatumema.pdf
- http://lawyersmarketingusa.com/user_upload_image/file/
- https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161344fdfaaea9---rudubutes.pdf
- http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614bf8376ea15---boxivajokugexotusosoj.pdf
- http://madonnina.info/userfiles/files/66406324732.pdf
- http://xn--90aoaidn.xn--p1ai/ckfinder/userfiles/files/vesuwudogo.pdf
- http://tufaghanafc.com/js/ckfinder/userfiles/files/90164647893.pdf
- http://woodlander.sk/grafika/file/71392090469.pdf
- https://aymexco.eu/ckfinder/userfiles/files/sebapa.pdf
- https://migger.dk/userimages/file/lixumisat.pdf
- http://alfamar.travelshops.pl/userfiles/file/82061887040.pdf
- http://355353.ru/userfiles/file/31263161996.pdf
- https://ibshospitals.com/userfiles/file/92639988780.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_off0000d600.bina6680ba95b51fe27b17205f6feeee2b1d6c38a5e24733f36ac5146b6baad0f08 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD600 | 10600 bytes |
font_01_sfnt_off0000ee42.bin374aac4572f127b8e9b5f6cf2ea884cb3f97a9e4196dfa54d2bd781c3369236c |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEE42 | 19004 bytes |
font_02_sfnt_off00011f69.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11F69 | 16792 bytes |
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