MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF contains numerous links to external websites, many hosted on compromised or disposable domains, suggesting a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing and trojan activity. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports the attack pattern of using compromised infrastructure to host malicious content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9973
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://archism.ru/uplcv?utm_term=fifty+shades+darker+watch+now PDF link annotation
- http://viquadro.com/userfiles/files/madenosuwakuxafin.pdfIn PDF document text
- http://www.beautyvogue.ch/Files/file/jisexunol.pdfIn PDF document text
- https://perfecthospitals.org/ckfinder/userfiles/files/jokut.pdfIn PDF document text
- http://www.lasallelille.com/admin/ckfinder/userfiles/files/sukidarewowirajezazupi.pdfIn PDF document text
- https://unitytradefze.com/ckfinder/userfiles/files/wogilufimofosux.pdfIn PDF document text
- https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/cfo8p44ifitdvi7thsbsiq6b7r/77334906075.pdfIn PDF document text
- https://valstybestarnyba.com/upckfinder/files/46616740334.pdfIn PDF document text
- https://ceramicasvillaflor.cl/UserFiles/File/pugarolerumulevesosa.pdfIn PDF document text
- http://www.euro-fly.eu/userfiles/files/ruxipugesukara.pdfIn PDF document text
- http://thuocamakong.net/userfiles/image/file/16897991084.pdfIn PDF document text
- http://chafewyuok.handysociality.com/upload/files/pozulasosivuxutefenuge.pdfIn PDF document text
- http://stefanourso.com/public/userfiles/file/83541660168.pdfIn PDF document text
- http://sushikyototogo.com/uploads/files/22010318815.pdfIn PDF document text
- http://cssh.es/img/file/gixetod.pdfIn PDF document text
- http://braciszewska-klimek.pl/fck_files/file/potoz.pdfIn PDF document text
- https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ee3f272513---gutubonisedudez.pdfIn PDF document text
- https://techielingo.com/fck_uploads/files/nofamabuwuzitikinivoge.pdfIn PDF document text
- https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/e6ce58a7d787dc21a23ae0edc4d882b5/57843844240.pdfIn PDF document text
- https://pcparts.fr/ckfinder/userfiles/files/70860563157.pdfIn PDF document text
- https://journeywithmypet.com/ckfinder/userfiles/files/bimuvivonu.pdfIn PDF document text
- http://xn--vb0b83rba554gca.kr/page_data/file/20210921113559.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_off0000ac84.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xAC84 | 15800 bytes |
SHA-256: 9084ba386eaa1c830869ed85b90b072f9bd16eeb0f3b496bedcc6396cd44cea5 |
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font_01_sfnt_off0000d568.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD568 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off0000ed7f.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xED7F | 10796 bytes |
SHA-256: 567f46fe10455afa7a9bf90d98b9a9fb24aa7aa850838334c8f1a2d5af377f59 |
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