MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
T1203 Exploitation for Client Execution
The sample is a PDF containing embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or delivering malicious content. The PDF also contains numerous external URIs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious destinations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the exploitation of a client vulnerability to execute further stages.
Machine Learning
- Nyx PDF Classifier malicious score 0.9998
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://oniceh.ru/uplcv?utm_term=greek+and+latin+roots+worksheets+6th+grade+pdf PDF link annotation
- https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/7152702cd15bff0660a3d6147c037296/topuzedozavidumali.pdfIn PDF document text
- https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/d1550818d59da36ba164194a90008e40/podun.pdfIn PDF document text
- http://beiks.info/public/file/46035538616.pdfIn PDF document text
- http://fitviewer.biz/files/file/nesafododeresunisanovi.pdfIn PDF document text
- https://www.tanyadantus.com/wp-content/plugins/super-forms/uploads/php/files/5cbc44a969d0f3500f0bf359b6a8cbb2/didibanilogo.pdfIn PDF document text
- https://aimara-bg.com/userfiles/file/danedafa.pdfIn PDF document text
- http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/697200539d9153289f9281a29a254aff/65699537540.pdfIn PDF document text
- http://interwork.sk/userfiles/file/zuzolubarapovorijuzodekex.pdfIn PDF document text
- https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/0e8d9482a870136ea953318a9852928f/menofakusejalukipiwilo.pdfIn PDF document text
- https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/b20209165bdfe28829a0e58c0bec8b2a/62554757449.pdfIn PDF document text
- http://sk-massimo.com/js/upload/files/65538718771.pdfIn PDF document text
- http://hornets88.com/clients/56662/File/63682899144.pdfIn PDF document text
- https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/0a2cfde633dab515c404fcdb53cf8e75/90922363731.pdfIn PDF document text
- http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/517037c9fa27d75da814ada5af30bbf5/20778597917.pdfIn PDF document text
- https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/j5l86r08d1q2fgc6fakvkovmbt/37962780633.pdfIn PDF document text
- http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/benujaseg.pdfIn PDF document text
- https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc026244a4---11914653565.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00014b76.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x14B76 | 5644 bytes |
SHA-256: 15562e70faca1670277a9040ddd98943f7d9228c80702591fca539a8b99bd4d4 |
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font_01_sfnt_off00015ebf.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x15EBF | 12128 bytes |
SHA-256: 8795242168611dd011471f4a7dc063a663a19ece5a9e06a2b2cd0230307c0e34 |
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