MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, providing no direct user-facing content but likely serving as a container for these malicious links.
Machine Learning
- Nyx PDF Classifier malicious score 0.9986
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 http://master-stroi76.ru/userfiles/file/60635569513.pdf In PDF document text
- http://zjnep.com/ckeditor/ckfinder/userfiles/files/5444597871.pdfIn PDF document text
- https://tierrettung-in-katalonien.org/ckfinder/userfiles/files/83644316923.pdfIn PDF document text
- https://1snrpaulista.com.br/ckfinder/userfiles/files/texexonotelutotugi.pdfIn PDF document text
- https://www.bakkersvlaanderen.be/resources/plugins/ckfinder/userfiles/0/files/66681895214.pdfIn PDF document text
- http://elai.kz/upload/2021/09files/210909115844787040h3yzt.pdfIn PDF document text
- https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bb7e5a7ab5.pdfIn PDF document text
- https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/a9b2cab610e0a55aea92ed983d538c54/rozisufeve.pdfIn PDF document text
- https://camping-du-lac-dijon.com/userfiles/fichiers/87381927117.pdfIn PDF document text
- http://elma1.ru/!upload/files/tegifexudesor.pdfIn PDF document text
- http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130278740fa7---42363396614.pdfIn PDF document text
- https://optimuselearningschool.aels.edu/learning/site/images/uploadfiles/gitezufuvefalupa.pdfIn PDF document text
- http://hindustanadvancedsolution.com/t/tutorfirm/uploads/ck/files/50540263450.pdfIn PDF document text
- http://bonezi.morefriendship.com/upload/files/68684211156.pdfIn PDF document text
- http://proclima-membranes.ru/userfiles/file/45037149327.pdfIn PDF document text
- http://loaamtran.vn/files/usersfiles/files/zugepepagep.pdfIn PDF document text
- http://hyunshin.net/userfiles/file/85098477964.pdfIn PDF document text
- https://hanakspotrebice.cz/eshop/ckfinder/userfiles/files/92403429954.pdfIn PDF document text
- http://dominant.name/userfiles/file/66227908351.pdfIn PDF document text
- https://printsolutions.printsolutions.bg/uploads/wysiwyg/files/23337397186.pdfIn PDF document text
- http://arabstina.com/ckfinder/userfiles/files/15233124950.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=five+love+languages+by+gary+chapman+pdfPDF link annotation
- 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_off0000b1f7.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB1F7 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000ca0e.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCA0E | 11368 bytes |
SHA-256: 93e1eb981630da38445cb50230f51e245bed4f4773c2bc531d6cd712e47ea723 |
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font_02_sfnt_off0000e42e.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE42E | 15900 bytes |
SHA-256: f6ae0bdbc67ec92c019225273ed6290a8187ca6728a68d16c82db25d65d78404 |
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