MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It contains numerous links pointing to compromised WordPress uploads and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest this PDF is part of a phishing campaign, likely delivered as a spearphishing attachment.
Machine Learning
- Nyx PDF Classifier malicious score 0.9977
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://chcial.ru/uplcv?utm_term=the+left+side+of+my+back+hurts+when+i+breathe
- http://studiosiriosrl.it/userfiles/files/guzemotatexowutemuri.pdf
- http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16105be4624877---99646066547.pdf
- http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160827f3fe5edd---39433274854.pdf
- http://tilestone-pools.com/i/File/70120950606.pdf
- https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa04d93dc6.pdf
- http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160855b1a31b8b---18319074894.pdf
- http://tasarimak.net/ckfinder/userfiles/files/14578679552.pdf
- http://issaproject.com/app/views/panel/ckfinder/userfiles/files/fimesugirumuvera.pdf
- https://midasspa.com/ckfinder/userfiles/files/xefurepoj.pdf
- http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b03dbc8c96---zadinetidoxobowewu.pdf
- http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a924e5aa5---gajofiravobisur.pdf
- https://allianztc.ro/files/file/26888478096.pdf
- https://pubgpin.com/calisma2/files/uploads/revip.pdf
- https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/9193a66109b124d3bb252d51932726d0/xixitemeforu.pdf
- http://mazdooradda.com/userfiles/file/logugebowakafodabezeparur.pdf
- https://associazionedynamica.it/uploads/file/51248685382.pdf
- http://falerisztika.hu/tmp/genimujebabasokokol.pdf
- http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609afe3e3078b---dexamexe.pdf
- https://canionglobal.com/FCKeditor/file/tamilobokomije.pdf
- http://learnersdigest.org/userfiles/file/44034043780.pdf
- http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4081790094---paranex.pdf
- http://szyldkj.com/luodan/images/userfiles/file/podivoguluwobijeteduxu.pdf
- https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160940f4952408---77738649466.pdf
- https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/0spvd5pro0k3vjson0v5iulm45/juxekapojej.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_off0000ed58.binbe1873b467fc8ba4490874f9126c2043ee0a144e1a7890e677e15b692f980d61 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xED58 | 17404 bytes |
font_01_sfnt_off00011a79.bin880fafaabf3dbcbbb25b7d55f134a184752a74e7d992b13625be05ed53d3aa47 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11A79 | 11236 bytes |
font_02_sfnt_off000134c4.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x134C4 | 16792 bytes |
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