MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF contains a large number of external links, identified as a link farm, with the primary URL being vilenefex.ru. This suggests a phishing or malware distribution attempt, masquerading as a chess book. The ML classifier and ClamAV detection strongly indicate malicious intent.
Machine Learning
- Nyx PDF Classifier malicious score 0.9997
Heuristics 5
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Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARMSmall PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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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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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://vilenefex.ru/strik?utm_term=chess+endgame+puzzles+book+pdf
- https://gipazekafasulal.weebly.com/uploads/1/3/4/6/134600210/rinejufej.pdf
- https://satupagewamikim.weebly.com/uploads/1/3/4/5/134584558/1972493.pdf
- https://cdn-cms.f-static.net/uploads/4481156/normal_603c658cb8628.pdf
- https://cdn-cms.f-static.net/uploads/4369311/normal_601380a474dfe.pdf
- https://cdn-cms.f-static.net/uploads/4463794/normal_5fd1d607b1d40.pdf
- https://cdn-cms.f-static.net/uploads/4459341/normal_5fdb292752dc0.pdf
- https://nowitijot.weebly.com/uploads/1/3/4/7/134716658/webudefomirane.pdf
- https://likukekubusaz.weebly.com/uploads/1/3/1/4/131408788/525047ac4fd8bb.pdf
- https://bitabado.weebly.com/uploads/1/3/1/4/131436956/15b2a211cf153.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://www.daltonmaag.com/
- https://uploads.strikinglycdn.com/files/d10380e8-8769-4bbe-8b62-e06cc56f7a4e/sefuxusame.pdf
- https://uploads.strikinglycdn.com/files/8789ea71-bc12-4992-848b-16201c8540f9/xixifa.pdf
- https://uploads.strikinglycdn.com/files/668b2834-6b8a-4741-b93c-53e55f1da356/how_to_turn_on_the_stove_pilot_light.pdf
- https://uploads.strikinglycdn.com/files/74d2cce6-a36d-4db6-804f-4c9aa89eafc7/dispute_review_board_vs_arbitration.pdf
- https://uploads.strikinglycdn.com/files/4f9eeda2-4f18-4082-98d8-7eae6ad24ec0/les_miserables_cast_salary.pdf
- https://uploads.strikinglycdn.com/files/93156700-fae8-4377-9007-e38db83158a7/lubowi.pdf
- https://uploads.strikinglycdn.com/files/c9187eb4-4ab2-43e7-9e12-9bd71d3a8d6f/vudonikef.pdf
- https://uploads.strikinglycdn.com/files/00ef6fcc-4965-4eb0-a249-c95c802d7f30/3153927554.pdf
- https://uploads.strikinglycdn.com/files/38595061-d1d5-429b-94d6-63ee460ef532/duzusak.pdf
- https://uploads.strikinglycdn.com/files/3f1b9b4d-4c72-4731-86f0-a5dbde78a2ce/monstrous_synonyms_in_hindi_for_class_3.pdf
- https://uploads.strikinglycdn.com/files/f2017fce-36b7-4987-a697-d3cbdc1e5d9e/liwilajil.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00012582.bin1ed0322afdd860e9048c7b8bd03b4ba9185428f25886ca70f84d6f77d5be51f2 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12582 | 5388 bytes |
font_01_sfnt_off000137ac.bin38ed7ae3c749ac51a035dee65fedc6d53660f6756d8bc098649f586e4a761d27 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x137AC | 11704 bytes |
font_02_sfnt_off00015f41.bin05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x15F41 | 4324 bytes |
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