MALICIOUS
176
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.001 User Execution: Malicious Link
The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous embedded URLs, many pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this, indicating a deliberate attempt to obscure the malicious destinations.
Machine Learning
- Nyx PDF Classifier malicious score 0.9990
Heuristics 7
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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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QR-code redirect lure medium SE_QR_LUREDocument instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
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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://crewmak.ru/uplcv?utm_term=how+to+turn+on+your+hotspot+on+android PDF link annotation
- http://wwstationery.com/files/file/43699058861.pdfIn PDF document text
- http://inannamsao.com/uploads/files/50998983853.pdfIn PDF document text
- https://hchoanglong.vn/userfiles/file/mibazowajimalagobisopa.pdfIn PDF document text
- http://balie.overeembv-profielen.nl/upload/files/67400672415.pdfIn PDF document text
- https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/fccp1nd3gq9pc7tvg1a82bfa91/27125951052.pdfIn PDF document text
- http://www.guus.edu.mn/ckfinder/userfiles/files/taxorokuvu.pdfIn PDF document text
- https://braindevelopmentmaps-org.neurondevelopment.org/userfiles/files/bovuzaxamak.pdfIn PDF document text
- https://atlanticcompact.org/userfiles/files/59326835016.pdfIn PDF document text
- https://bcm.es/files/galeria/files/gokijukaxo.pdfIn PDF document text
- http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146c65a6a2a8---wiwiduxumifezakamukoji.pdfIn PDF document text
- https://niboparis.com/upload/fckeditor/file/1631070601_1.pdfIn PDF document text
- http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613b15f0e6aea---venututarusovaride.pdfIn PDF document text
- http://stellamaris.cz/userfiles/97424679719.pdfIn PDF document text
- http://pmke.cz/pictures/files/63222353708.pdfIn PDF document text
- http://canoeing.by/pics/files/xewupa.pdfIn PDF document text
- https://istanbulbalbir.com/upload/ckfinder/files/40012550579.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_off0000feea.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFEEA | 19020 bytes |
SHA-256: cb214096b734ca92c5d1ef974000be386e3b6fe28766e449007d87ccc4657971 |
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font_01_sfnt_off00012fd3.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12FD3 | 10604 bytes |
SHA-256: 107c80279ed87434849ed956cd07d4fd28eda277d3863f845b2d07ec6c0fb54f |
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font_02_sfnt_off00014807.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x14807 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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