MALICIOUS
126
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The primary URL, 'https://vilenefex.ru/strik?utm_term=how+to+do+proofs+in+math', is presented as a resource for math proofs, but the overall structure and link farm behavior indicate a malicious intent, likely to drive traffic to potentially harmful sites or for SEO poisoning. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.
Machine Learning
- Nyx PDF Classifier malicious score 0.9967
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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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://vilenefex.ru/strik?utm_term=how+to+do+proofs+in+math PDF link annotation
- https://cdn-cms.f-static.net/uploads/4489598/normal_5fd62d3907062.pdfIn PDF document text
- https://cdn.sqhk.co/lukulobu/gjhjhic/fadirimuroxijifoninujiro.pdfIn PDF document text
- https://lapadodipelij.weebly.com/uploads/1/3/1/1/131164402/f58694b1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4386852/normal_602107393ad40.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4451945/normal_5fc8199663066.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4485157/normal_603d60cc891eb.pdfIn PDF document text
- http://wetudazuxuso.iblogger.org/breast_cancer_statistics_south_africa_2020.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4505699/normal_600eb11840da1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4488322/normal_606644e2e9871.pdfIn PDF document text
- https://cdn.sqhk.co/xuzalolotagi/hddgd78/70884305323.pdfIn PDF document text
- https://cdn.sqhk.co/fojufifef/A4jbSEm/28876578423.pdfIn PDF document text
- https://timakopazasiri.weebly.com/uploads/1/3/4/4/134445807/b4c86172e8b3.pdfIn PDF document text
- https://jajesawi.weebly.com/uploads/1/3/0/8/130813829/piwameviku_zogulisoguf.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4460071/normal_60673e1620a31.pdfIn PDF document text
- https://wefikugozakilo.weebly.com/uploads/1/3/1/0/131069992/3429956.pdfIn PDF document text
- https://safapovajedetux.weebly.com/uploads/1/3/4/6/134642125/vemiwofetijepofozo.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4452398/normal_6046ab1300461.pdfIn PDF document text
- https://tewabigonin.weebly.com/uploads/1/3/4/7/134760563/xogagigazebewa.pdfIn PDF document text
- https://vunisanelebori.weebly.com/uploads/1/3/3/9/133999195/rotalulelozewim.pdfIn PDF document text
- https://mamexobupelo.weebly.com/uploads/1/3/1/3/131383482/5928690.pdfIn PDF document text
- https://cdn.sqhk.co/negapevu/aichiXQ/wind_hero_mod_menu.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366036/normal_603e799ade4c7.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://dativolulonal.epizy.com/modern_biology_textbook_for_senior_secondary_school.pdfIn PDF document text
- http://fevidubigozexa.rf.gd/gajexexunivixepenesadat.pdfIn PDF document text
- http://vibesevazetiv.rf.gd/factores_de_riesgo_para_el_cancer_de_prostata.pdfIn PDF document text
- http://kesobiw.rf.gd/identification_of_pathogenic_fungi_campbell.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://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_off0000fbdd.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFBDD | 5300 bytes |
SHA-256: 2fb35356b3614998d29dd3d12211ec235c95efc646aff6260de34fbc98af0396 |
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font_01_sfnt_off00010dc9.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10DC9 | 10692 bytes |
SHA-256: 53a1773b628bebd65bc4368e64ba944f1dea4b2530f0c5b5878a645a814bd012 |
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