MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with numerous URLs pointing to external sites, some hosted on compromised CMS platforms. The `wkhtmltopdf` authoring application suggests it may have been generated programmatically to serve as a lure.
Machine Learning
- Nyx PDF Classifier malicious score 0.9974
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://oniceh.ru/uplcv?utm_term=forever+stamp+weight+limit PDF link annotation
- https://ms01bet.net/contents/files/tikudi.pdfIn PDF document text
- http://sangiorgioautoservizi.com/userfiles/files/vebubedarod.pdfIn PDF document text
- https://cjsc.se/ckfinder/userfiles/files/82134324096.pdfIn PDF document text
- http://polymer-optix.de/userfiles/file/lakiramasamalopixevabovuf.pdfIn PDF document text
- http://jjw-led.com/userfiles/file/22770212753.pdfIn PDF document text
- http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613b0343d3481---buravuvufek.pdfIn PDF document text
- https://candbco.com/ckfinder/userfiles/files/xunokasidokus.pdfIn PDF document text
- https://rosanaalvarracin.com/userfiles/file/detomopuditavuwiweguk.pdfIn PDF document text
- https://pielinks.com/UserFiles/file/wozavowus.pdfIn PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d94aa0ab15---jobetevemototopavuripef.pdfIn PDF document text
- http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153b7eb8e7d0---83165207489.pdfIn PDF document text
- http://hotelgiottotorino.com/userfiles/files/gepuzi.pdfIn PDF document text
- http://imbirimbir.ru/files/boledufok.pdfIn PDF document text
- http://jump360.co/upload/files/20210901160614.pdfIn PDF document text
- http://caphegiabao.com/upload/fck/file/20913043241.pdfIn PDF document text
- http://lanaecoloridabruzzo.it/userfiles/file/38400675167.pdfIn PDF document text
- https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/4ut3stqs5lrg4vltcorpnl0val/44163186386.pdfIn PDF document text
- https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/7k2q79ipeco5dkl28pmvtmuejf/7332236399.pdfIn PDF document text
- https://kinohorror.com/upload/file/43962995862.pdfIn PDF document text
- https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/d673b6bc44bddc642d1eb8cf5844e292/50919151727.pdfIn PDF document text
- http://world-housing.jp/ckfinder/userfiles/files/wolizagavapi.pdfIn PDF document text
- http://ozdesignhouse.com/app/webroot/uploads/files/nurur.pdfIn PDF document text
- http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/72305092751.pdfIn PDF document text
- https://www.luthier-auxerre.fr/ckfinder/userfiles/files/16737522903.pdfIn PDF document text
- http://dainichiji.com/upload_ckr/files/jeponusunimi.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_off0000d792.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD792 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000efa9.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEFA9 | 10724 bytes |
SHA-256: 95403c3cd279d6e4500ad655aec9dc79269f26df0262e2b29b8b0b34ac0f3e29 |
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font_02_sfnt_off0001085a.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1085A | 19224 bytes |
SHA-256: e82fe7eff0987cbd5f5a560f0078d5b79151c0516a49a5d5a6349f8330aeeaab |
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