MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains embedded JavaScript and multiple external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to distribute malicious files. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via a spearphishing attachment. The embedded JavaScript is likely used to obfuscate the download process or exploit vulnerabilities.
Machine Learning
- Nyx PDF Classifier malicious score 0.9964
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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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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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://smidgel.ru/uplcv?utm_term=octavia+butler+short+stories+pdf
- http://gtshotel.it/images/file/bibaluji.pdf
- https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/c2e93662e47f96fe518a537839b625ab/bewevozonejakenetudamet.pdf
- http://aliceinformaticasrl.com/user/pages/33602791805.pdf
- http://onmamtour.com/FileData/ckfinder/files/20210911_D9CE82345B523077.pdf
- http://loadcell.vn/Images_upload/files/83252149650.pdf
- http://vector-mebel.ru/uploads/files/kusijolurasazojuxi.pdf
- http://dvg.asia/ckfinder/uploadfiles/files/fewatukipofosoxejim.pdf
- https://www.wizzfizz.com.au/application/third_party/ckfinder/userfiles/files/10880456987.pdf
- http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/4bfcb426aadd1752519308ac1f457138/derin.pdf
- http://clinicaveterinariamontecchia.com/userfiles/files/84511081337.pdf
- http://oipipleszno.pl/userfiles/file/29912688035.pdf
- http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613b37c7ad6ef---56814791727.pdf
- https://alident.centralcms.cloud/galeria/files/41240225832.pdf
- http://m-styleauto.com/js/upload/files/1853102296.pdf
- http://studiotecnicopinto.it/userfiles/files/90615700950.pdf
- http://sumosushingrill.com/uploads/files/tapikarenu.pdf
- http://originalcheck.it/public/img_admin/file///66924013860.pdf
- https://giaphutelecom.com/tctt/sites/aaa/file/58039040783.pdf
- https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/b3cf152e3ba9510d4d15f7285c20d764/79789468902.pdf
- http://www.trisad.kz/ckfinder/userfiles/files/fugidavimezuma.pdf
- http://hong-tour.com/FileData/ckfinder/files/20210907_91A69EAF51002F49.pdf
- http://sklepjola.pl/userfiles/file/47015522337.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_off0000e29f.binb498a28efcc34aa0200f5bd57f3dc2b874ff33b9e69f5571578190009365c424 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE29F | 18032 bytes |
font_01_sfnt_off00011181.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11181 | 16792 bytes |
font_02_sfnt_off00012998.binc02c2f6dbc881c1c89fdc9978b6386217d032ed6ebb56aba13ca7a8e573bcd71 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12998 | 10944 bytes |
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