MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm on disposable hosting, with numerous URLs pointing to compromised CMS uploads and potentially malicious content. The PDF structure itself appears to be a lure, likely intended to trick users into clicking the embedded links, which could lead to phishing pages or malware downloads.
Machine Learning
- Nyx PDF Classifier malicious score 0.9951
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=problemas+con+ecuaciones+de+primer+grado+pdf PDF link annotation
- http://heldermusic.nl/ckfinder/userfiles/files/fugerezidigolibatizereduk.pdfIn PDF document text
- http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac506a8b637---90368401811.pdfIn PDF document text
- http://leebyenghun.com/new/upload/board/files/boxivev.pdfIn PDF document text
- http://marmaraisg.com/images_upload/files/24600725036.pdfIn PDF document text
- http://ahdongjiu.com/upload_fck/file/2021-5-16/20210516150031749564.pdfIn PDF document text
- http://poorclarescork.ie/images/98867460581.pdfIn PDF document text
- http://hoteldarim.ir/basefile/hoteldarimir/files/67448894228.pdfIn PDF document text
- http://tunglamgarden.com/images/fck/file/11859742675.pdfIn PDF document text
- http://auburn-properties.com/userfiles/files/51357403586.pdfIn PDF document text
- https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d64dade5503---pabokukigegutixumataza.pdfIn PDF document text
- http://aylincinarli.com/fckfiles/file/pozefefi.pdfIn PDF document text
- https://morganmethod.tuesdaytrader.com/ci/userfiles/files/36750731828.pdfIn PDF document text
- http://nfraccon.org/userfiles/file/2003086962.pdfIn PDF document text
- https://www.pelicanfinancialnetwork.com/ckfinder/userfiles/files/29574339339.pdfIn PDF document text
- https://aonetreks.com/uploads/file/katotalisekenusi.pdfIn PDF document text
- http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607da12179b02---piwuwufedifa.pdfIn PDF document text
- https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2c91a154b---81428150383.pdfIn PDF document text
- https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a737e15a7f---laxarudizofivopipexateja.pdfIn PDF document text
- https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/e6363cd3f14960a3742fdeeb61c8e67e/dixinazol.pdfIn PDF document text
- http://dbjhockeytournament.com/clients/f/f9/f9ff496842c877cbb4522510b668f2a2/File/51104455914.pdfIn PDF document text
- https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/h7mfiuvgq3kp5m9gei6abafh2o/16265985463.pdfIn PDF document text
- http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609578d368e8f---gukovepebawog.pdfIn PDF document text
- http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/2cff8171f90e76eb2814e81513090b5c/rasufix.pdfIn PDF document text
- http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e73928c8bb---17437319635.pdfIn PDF document text
- http://maivietnamesecotati.com/uploads/files/79432284951.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_off0000dc43.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDC43 | 11104 bytes |
SHA-256: 573ddd879b2c5c61e488d8dcc82b5fe7972b54a6823b7e90397ea0a695b774e4 |
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font_01_sfnt_off0000f5a5.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF5A5 | 20184 bytes |
SHA-256: c4118b89ee43b603f1e545ed27d412bdeee632ca0fdf2c61de42c5f1b1bb0bda |
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font_02_sfnt_off00012805.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12805 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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