MALICIOUS
96
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF file contains a large number of embedded URLs, many of which point to compromised WordPress sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates this is a link farm on disposable hosting. The ML classifier also flagged this PDF as malicious with high confidence. The primary purpose appears to be redirecting users to potentially malicious or SEO-manipulated content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9977
Heuristics 5
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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://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/4accadf5bb027abbda5bacc7bdbd42e0/kibod.pdf In PDF document text
- https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608680acb0d9f---jirivoxasowuwisaga.pdfIn PDF document text
- https://taichielite.com/louis/taichi/ckfinder/userfiles/files/33573622809.pdfIn PDF document text
- http://irpuyesh.com/cache/fck_files/file/luxenewizadetof.pdfIn PDF document text
- https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/b362152a9c6bb80f176cf7045aa4a769/nuzagokesetusedevutifetun.pdfIn PDF document text
- http://thebestpearsonfamily.com/clients/e/e6/e6a49a9b6fa3fb0349b1957bd02e8b5b/File/fokeved.pdfIn PDF document text
- http://strategie-online.net/catalogue_dynamique/file/40042800419.pdfIn PDF document text
- http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b59d3512ddf---62349843598.pdfIn PDF document text
- https://pro-biomed.com/admin/userfiles/file/kolezovilegoguwiniju.pdfIn PDF document text
- https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/7fd2e943e57fa8c014338a775f04f3e4/54403918778.pdfIn PDF document text
- http://yule-sign.com/upload/editor/file/20210606034627.pdfIn PDF document text
- https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2073b176ad---fazutetevumit.pdfIn PDF document text
- http://motivationandmomentum.net/ci/userfiles/files/lulub.pdfIn PDF document text
- https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1608456f2611e3---zaxedajon.pdfIn PDF document text
- http://bosch-service-center.ru/uploads/files/51881292606.pdfIn PDF document text
- https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/es0043eovvnlgivfpbia8v45ql/julisajapatijoronosipe.pdfIn PDF document text
- http://autoset66.ru/admin/ckfinder/userfiles/files/71000549586.pdfIn PDF document text
- http://cukiernia.eu/upload/files/torolanogufajuzidovizedo.pdfIn PDF document text
- http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a3917b730fc---94114074849.pdfIn PDF document text
- http://beerskiboot.de/img/upload/file/katomudetuvafuvavu.pdfIn PDF document text
- http://buddhavehicle.com/userfiles/file/28456799180.pdfIn PDF document text
- http://jingchengs.com/jingchengs/ckfinder/files/20210726155749.pdfIn PDF document text
- http://xn--365-pn7mwb654m2qn.com/ckupload/files/7794435562.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=science+multiple+choice+questionsPDF 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_off0000df01.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDF01 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000f718.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF718 | 10700 bytes |
SHA-256: 5a4be8896bdd2d6325affff54642996b2ac6b33d8a00c38d4214fe611c7a525b |
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font_02_sfnt_off00010f63.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10F63 | 18332 bytes |
SHA-256: d34011b9810f150fe9274c3235100813620a61f6085429b7de490a2f06aec038 |
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