MALICIOUS
196
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF document employs a social engineering lure, instructing the user to install a browser extension or update, a common tactic for credential theft or malware delivery. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs and the document's structure as a link farm suggest it is part of a phishing or malware distribution campaign.
Machine Learning
- Nyx PDF Classifier malicious score 0.9975
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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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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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://ketchas.ru/uplcv?utm_term=how+to+convert+mp4+to+mp3+offline PDF link annotation
- https://nordiskvillaventilation.dk/userfiles/file/33987642620.pdfIn PDF document text
- https://imagebrandstudio.com/userfiles/file/vejezezetamavubolomak.pdfIn PDF document text
- http://bukharajohnscreek.com/sites/default/files/file/xudomufazexabetuz.pdfIn PDF document text
- http://liily.jp/upload/file/20210902052644.pdfIn PDF document text
- http://cdmvt.cz/sites/default/files/giduvepevixisetu.pdfIn PDF document text
- http://ctcinsulator.com/uploads/file/zakabakagilubix.pdfIn PDF document text
- http://entone.es/wp-content/plugins/super-forms/uploads/php/files/77ab5ee856c065a7fe2b179124e1e28a/wokituximapi.pdfIn PDF document text
- http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139c5d362b7f---14211806991.pdfIn PDF document text
- https://bomberosdenavarra.com/userfiles_nexo/files/sefatofabuzi.pdfIn PDF document text
- http://sochisushi.nl/survey/userfiles/files/tawoj.pdfIn PDF document text
- http://vhshf.de/File/79412503830.pdfIn PDF document text
- http://morebricks.com/ckfinder/userfiles/files/43232980480.pdfIn PDF document text
- http://jhdjt.com/images/upload/File/54064496484.pdfIn PDF document text
- http://verypool.cn/images/upload/File/23419657820.pdfIn PDF document text
- https://www.pharmawell.eu/ckfinder/userfiles/files/tunizugel.pdfIn PDF document text
- https://tavcam.com/upload/ckfinder/files/26655091985.pdfIn PDF document text
- http://nayyaralidada.com/alpha/ckfinder/userfiles/files/sejixulel.pdfIn PDF document text
- https://caror.hu/ckfinder/userfiles/files/59018676509.pdfIn PDF document text
- http://tech-sub.com/userfiles/file/41382093823.pdfIn PDF document text
- https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130765cb52a9---71485219943.pdfIn PDF document text
- http://restauraceeverest.cz/userfiles/file/64457928088.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_off0000d304.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD304 | 18844 bytes |
SHA-256: f53374da8cdd3849af6f0cd18c46726763025e223ff20ecd429b01eaa4aef452 |
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font_01_sfnt_off000103a3.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x103A3 | 10704 bytes |
SHA-256: a10b584c60abcfb8bac9675ae9cdd970509bc8c9d1d83140aa0d7e4e96477c90 |
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font_02_sfnt_off00011c39.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11C39 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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