MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Numerous external URLs are embedded within the PDF, many pointing to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution scheme. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the idea that this document is part of a link farm designed to attract traffic, likely for malicious purposes.
Machine Learning
- Nyx PDF Classifier malicious score 0.9974
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://archism.ru/uplcv?utm_term=appropriate+technology+book+pdf
- http://brmxn.com/userfiles/file/20210626185252_t6ugwp.pdf
- http://www.johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/jofiduz.pdf
- http://hrudolf.com/userfiles/xatamik.pdf
- https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/020f42b450e95a18483d7256891480ba/danijazafitimigamikorujux.pdf
- https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/d50eea608ad9692f930326be163b2143/xesekenojurixumisunu.pdf
- http://sxhk365.com/uploads/file///33222912362.pdf
- https://mobilieroccasion.fr/uploads/file/sizokusa.pdf
- https://abugfreemind.com/userfiles/file/20612196856.pdf
- http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/4d8ecghhqttiv6udh9d0eh5tjk/50145063874.pdf
- http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607db41d5e5ad---13553785501.pdf
- http://mariamozharova.ru/uploads/files/baduwasaluri.pdf
- https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/8kqk33o7f0f4e0op13djo9lhb7/29351147073.pdf
- http://coreaad.com/DreamDataUpload/file/sikunijafajaf.pdf
- http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/13559649992.pdf
- http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/ro654i2tqp3em9udejkkjng99a/69197707821.pdf
- https://maconlux.lu/userfiles/files/piwoxonefinowubivizujiwi.pdf
- https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdfad822cae---82724482331.pdf
- https://eltechma.com/zdjecia/fck/file/16665998449.pdf
- https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc78f35f078---tobilaremas.pdf
- http://otoozevran.com/resimler/files/71041020845.pdf
- https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/3cec88c39c20f213f0e904cc82a37dc3/xenapirupigenije.pdf
- https://dlt-nkp.com/fileupload//file/80392371540.pdf
- https://castilloexterior.net/ckfinder/userfiles/files/37118297784.pdf
- http://gomientrung.vn/uploads/image/files/32967247998.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000dc1b.bin0e75d52c35b1f9beb8f62908592ad96e4cd984d7095c4d5df09ef46cbc768c92 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDC1B | 18116 bytes |
font_01_sfnt_off00010b84.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10B84 | 16792 bytes |
font_02_sfnt_off0001239b.bin30437b3e8a08e833a568bd12e3698ccb9b384b24a9ce25352db1711f9ba3a208 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1239B | 11060 bytes |
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