MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised WordPress sites and disposable hosting domains, likely for phishing or malware distribution. The presence of numerous external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly support this attack pattern.
Machine Learning
- Nyx PDF Classifier malicious score 0.9998
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 https://krisoc.ru/uplcv?utm_term=where%27s+my+refund+cycle+chart PDF link annotation
- http://beastyenergy.com/userfiles/file/ridodaruroma.pdfIn PDF document text
- https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607214be3fd13---30074389008.pdfIn PDF document text
- https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/8al1rm5c6ne5u5ku4525eoebti/murowivolupuluvo.pdfIn PDF document text
- http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160794f7983819---64676597584.pdfIn PDF document text
- https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/e60250bf371554dae56957d9340162fe/14493468737.pdfIn PDF document text
- http://vitalbafitnessclub.eu/userfiles/files/ketezebosofirukipex.pdfIn PDF document text
- http://all-pass.com/folder/editor/file/33377328624.pdfIn PDF document text
- http://cn-junsheng.com/upload/file///2021730235411360.pdfIn PDF document text
- https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaef48e1f0b---rubenuzeburoxejaj.pdfIn PDF document text
- http://kimbuunguyen.com/uploads/userfiles/file/sexozedelafosilikojarak.pdfIn PDF document text
- http://crmrealty360degree.in/userfiles/file/binowoba.pdfIn PDF document text
- http://alimentosldm.com/userfiles/file/bupaforadijuri.pdfIn PDF document text
- http://kd-council.com/upfile/files/26157070237.pdfIn PDF document text
- https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608c32503eb30---kolamafamuganenakole.pdfIn PDF document text
- http://laboratoriodiprogettazione-ve.it/userfiles/files/nozaxitidagejagiregij.pdfIn PDF document text
- http://www.mezmat.ru/ckfinder/userfiles/files/najorijimemetomefaduribe.pdfIn PDF document text
- https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/4fcfb2bbda7632b5dfbb8f7ed69eab6b/mudajoruritijafotaz.pdfIn PDF document text
- http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e902762f1---popuxabizonope.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_off0000cfdc.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCFDC | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000e7ee.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE7EE | 17020 bytes |
SHA-256: c071923a62bed8833f03472197f3f4174ba9b754aea47dfc2d1cd780c2e87e0f |
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font_02_sfnt_off000113da.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x113DA | 10772 bytes |
SHA-256: 1c89d1666a8314c7cd81c67ca83f726562757edd1bbc32e7301dad379efb5ed5 |
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