MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The file contains numerous external URIs and links to compromised WordPress upload storage, suggesting it functions as a link farm to distribute malicious content or phish for credentials. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution campaign, likely initiated via spearphishing attachment.
Machine Learning
- Nyx PDF Classifier malicious score 0.9943
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://chcial.ru/uplcv?utm_term=polio+pediatria+pdf PDF link annotation
- https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086706f74d24---22958504768.pdfIn PDF document text
- http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/7e0b6baf678c37189463b479903c3e29/nuzemujogivi.pdfIn PDF document text
- http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c506316f7---wigalusibadun.pdfIn PDF document text
- http://chamdure.com/DATA/files/30903498582.pdfIn PDF document text
- http://afghansolar.com/userfiles/file/vevupixotorasiguw.pdfIn PDF document text
- http://erbaytag.com/resimler/files/8629687905.pdfIn PDF document text
- https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609c967637f96---dezizilawotidab.pdfIn PDF document text
- http://gianphoiduyloimodel.com/Images_upload/files/jutekabenuvonevogo.pdfIn PDF document text
- http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b965a8f83d---77279633619.pdfIn PDF document text
- http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160dda06db5cd8---85100310158.pdfIn PDF document text
- http://xn--80adpfaaeictf0c6c7i.xn--p1ai/public/file/98478522744.pdfIn PDF document text
- https://12shio2.com/contents/files/38834804714.pdfIn PDF document text
- http://georgewongdesign.com/gwd/upload/files/64651355842.pdfIn PDF document text
- https://alshaabcoop.com/userfiles/file/48158794110.pdfIn PDF document text
- http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160cb2d478b5c3---80627434058.pdfIn PDF document text
- https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/woxakorinikozefokukiseto.pdfIn PDF document text
- http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f31a5c387---zugibelepojon.pdfIn PDF document text
- http://mail.teleserviciomalaga.com/ckfinder/userfiles/files/wutefaxakasokesijavul.pdfIn PDF document text
- http://neoneofytou.com/ckfinder/userfiles/files/petodanemutomevoxewal.pdfIn PDF document text
- http://efuegypt.org/userfiles/file/20954618983.pdfIn PDF document text
- https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/7690a79cbda24a95c121ecdee408252b/dozujonesevabaxivovana.pdfIn PDF document text
- http://innova-perila.ru/upload/files/16388234285.pdfIn PDF document text
- http://cablexconsulting.com/Upload/file/kibad.pdfIn PDF document text
- http://techbico.vn/uploads/image/files/vuponodepabujageganomopum.pdfIn PDF document text
- http://samtekelektrik.com/files/71225081149.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_off0000cb96.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCB96 | 10220 bytes |
SHA-256: 6ced12d893579e83e363780e36772de9af5a1d92debab41285056a58e3a34f9a |
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font_01_sfnt_off0000e29f.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE29F | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off0000fab1.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFAB1 | 17976 bytes |
SHA-256: 986f054485470a1c5e0de54f30f91708fb46bb4223b2f1b6720d247fc8e107b5 |
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