MALICIOUS
174
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and numerous external URIs, many of which point to PDF files hosted on disposable domains. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content likely prompts the user to install a fake browser update or extension, a common tactic for credential theft or malware delivery. The embedded JavaScript, while not fully analyzed due to potential obfuscation, is likely involved in executing the malicious payload or facilitating the lure.
Machine Learning
- Nyx PDF Classifier malicious score 0.9911
Heuristics 7
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ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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Browser extension / update installation lure high SE_BROWSER_INSTALL_LUREDocument tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
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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://huntic.ru/uplcv?utm_term=monster+honor+fight+mod+apk PDF link annotation
- http://cochemical.com/upload/files/zakaxaxaxonebofoke.pdfIn PDF document text
- http://envisystem.com/upload/userfile/files/62546391561.pdfIn PDF document text
- http://alisawedding.com/upload/users/files/53734918386.pdfIn PDF document text
- http://nyett.hk/uploads/news/files/94937765636.pdfIn PDF document text
- https://makojudo.pl/zdjecia/fck/file/vesoketadalifa.pdfIn PDF document text
- https://ardiinerkh.mn/uploads/userfiles/files/nipezaf.pdfIn PDF document text
- http://allprintusa.com/admin/images/file/latuzewixezexaxosarabibo.pdfIn PDF document text
- http://hightopeducation.com/cms_uploaded/file/tirez.pdfIn PDF document text
- https://silverbirdmarketing.com/pages/images/file/nuzeluzosemulomorari.pdfIn PDF document text
- http://saraiaser.nl/userfiles/file/sekunefuwefapevujan.pdfIn PDF document text
- http://dajuicebarus.com/uploads/files/rimesatagasogepuzepevalev.pdfIn PDF document text
- http://jeansresource.com/js/ckfinder/userfiles/files/mijigapotazimugof.pdfIn PDF document text
- http://www.perchegouet.com/ckfinder/userfiles/files/72277052378.pdfIn PDF document text
- http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/161377c12a4bd6---69475530670.pdfIn PDF document text
- https://muacash.com/webroot/img/files/14724210011.pdfIn PDF document text
- http://yidaig.com/uploadfile/file/20210920101135.pdfIn PDF document text
- https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/98e715d5231dcffd890b915d3445cab0/doxesuxivuxadebos.pdfIn PDF document text
- http://usateatop.com/_upload/files/90353340486.pdfIn PDF document text
- https://hfbee.tw/upload/ckfinder_temp/files/20210903235615.pdfIn PDF document text
- http://nepodoshlo.kz/ckfinder/userfiles/files/fexakeki.pdfIn PDF document text
- http://preciz.com/uploads/wysiwyg/files/lisinomo.pdfIn PDF document text
- http://avtokit116.ru/!upload/files/wadixejizadudov.pdfIn PDF document text
- http://shiinamotors.com/js/upload/files/pilokena.pdfIn PDF document text
- http://xindeshiye.com/uploadfile/file///2021092308433951.pdfIn PDF document text
- 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_off0001ea6c.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1EA6C | 21360 bytes |
SHA-256: 49dc6ca71b67502bd0ab73bc4a77f45ada00464b61ab602b8bff1f63be54492a |
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font_01_sfnt_off0002230f.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x2230F | 10984 bytes |
SHA-256: 3b5c629e153ef50865f861e13558c7df34c6093aa591478c82997c9baf630093 |
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font_02_sfnt_off00023c38.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x23C38 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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