MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF file contains numerous external links, many pointing to compromised WordPress sites, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution attempt, likely initiated via spearphishing attachment.
Machine Learning
- Nyx PDF Classifier malicious score 0.9998
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=libro+de+aurelio+baldor+aritmetica PDF link annotation
- http://anhuicrew.com/upload_fck/file/2021-4-30/20210430174719277318.pdfIn PDF document text
- https://pametnidom.hr/pametne_kuce/userfiles/file/89137320083.pdfIn PDF document text
- https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/b0fb22216d76199a9944095df6f00e43/25206500423.pdfIn PDF document text
- https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/44fcb671b2a82705fb460f0f4e6de870/bojezupepifa.pdfIn PDF document text
- http://files.ibiza-ferien.de/file/16258723720.pdfIn PDF document text
- https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/ggeuoj6f8bq92arrpi655258ia/97251844383.pdfIn PDF document text
- http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160837b6e3d365---68757496847.pdfIn PDF document text
- http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712f680b964---61563306236.pdfIn PDF document text
- https://angkoronetour.com/userfiles/file/47898250859.pdfIn PDF document text
- https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/o6sedm4dnhcm1nff64jjnffndp/38538975816.pdfIn PDF document text
- https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608712d82cc7a---46409171077.pdfIn PDF document text
- https://apsco.ly/userfiles/files/rimumofesoligujatabokobud.pdfIn PDF document text
- https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b9549a00c94---14231298758.pdfIn PDF document text
- https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16079c8669008e---9370003037.pdfIn PDF document text
- https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/18c17d6727f7b10e1b1cab9391e9a49c/28096917296.pdfIn PDF document text
- https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/3t3112mn28fdcomq10oe3bnkc1/24116998512.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_off00013c00.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13C00 | 4988 bytes |
SHA-256: b9ed611ca29dece32dff3195dba7df42994e0953bc0feebda1c905cd6ea98365 |
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font_01_sfnt_off00014ce3.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x14CE3 | 13408 bytes |
SHA-256: bc6e87f2694aa3633a2039d9db8a03d692dbfd940cd3dd1563993031652a0e70 |
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