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 a ClamAV detection and an ML classifier. It contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this. The document body is heavily obfuscated and unreadable, indicating an attempt to hide its true purpose.
Machine Learning
- Nyx PDF Classifier malicious score 0.9915
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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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://synerhu.ru/uplcv?utm_term=vr+launcher+for+android PDF link annotation
- http://autosvilar.com/uploads/ckfinder/files/xinegixovivizolakoxiku.pdfIn PDF document text
- https://davidfauquemberg.com/home/fauquemb/david/bbdg_site/userfiles/file/gajipuxaxewoledenil.pdfIn PDF document text
- https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/e1ef2eedd7d6a4f8d19f352cbb9e87f9/6524116411.pdfIn PDF document text
- http://savvyais.com/userfiles/file/jifofodenixag.pdfIn PDF document text
- http://polaryachts.com/res/wysiwyg/file/75992116940.pdfIn PDF document text
- https://milorem-service.ru/userfiles/file/muxod.pdfIn PDF document text
- http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148e976ef2df---29916432686.pdfIn PDF document text
- https://partnermind.cz/images/files/3722631553.pdfIn PDF document text
- http://briztravel.com/upload/files/joruko.pdfIn PDF document text
- http://mabifitness.it/userfiles/files/robori.pdfIn PDF document text
- http://www.catedralirodahaz.hu/data/editorfile/72192680115.pdfIn PDF document text
- http://na-bytecek.cz/UserFiles/File/57764252914.pdfIn PDF document text
- http://canxetaianhduc.com/images/file/tiborolifanotaxileliz.pdfIn PDF document text
- http://stpogfzz.com/attachments/202109/editor/file/webokitupovuwas.pdfIn PDF document text
- https://eastoncn.housemember.com/uploads/files/6095195904.pdfIn PDF document text
- https://agriplan-rs.com/dados/ckfinder/files/vetiniku.pdfIn PDF document text
- https://pellevah.com/upload/files/84240019011.pdfIn PDF document text
- https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/5961086011514e6b65b19989d2fcc3e8/tewizajiziburodu.pdfIn PDF document text
- http://annabarons.com/files/files/60445403831.pdfIn PDF document text
- http://jun-travel.com/userfiles/file/51051775766.pdfIn PDF document text
- http://fabrikando.com/cmsimple/images/file/32640252698.pdfIn PDF document text
- https://lexcyberia.com/userfiles/files/topamexuwupewoduvase.pdfIn PDF document text
- http://evrofurnitura.by/elax-furnitura.ru/uploads/files/61458096802.pdfIn PDF document text
- https://psychologgia.pl/Upload/file/bobaguves.pdfIn PDF document text
- http://weilandensemble.nl/ckfinder/userfiles/files/damumowajalugaje.pdfIn PDF document text
- https://rdsdealers.com/ckfinder/userfiles/files/kilafusosel.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_off0000b54d.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB54D | 17764 bytes |
SHA-256: 0ed8a7ae9b68e6327292152c6ffc926bfa4806f245fd0c1b9f6c67111e4bc099 |
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font_01_sfnt_off0000e232.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE232 | 10376 bytes |
SHA-256: 01b36c8800b0d55826e67cd081da8b52e102b14612f0aefdcecf4e30e7509766 |
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font_02_sfnt_off0000f980.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF980 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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