Is www.celso.org safe?

The scan of www.celso.org on 20 Aug 2026 reached no verdict either way (score -12). Too little was captured to judge it, which is an unknown rather than a pass.

What malware is associated with www.celso.org?

3 analysed samples communicate with this URL, including Phishing.

How was www.celso.org checked?

A static pass resolved DNS, captured TLS and headers and followed the redirect chain, and where the standard tier allows, a headless browser rendered the page and recorded every request. Egress is SSRF-locked. Signatures that matched only page text are weighted far below one that matched a served file, because a page documenting malware matches the same rules.

www.celso.org - URL scan, 20 Aug 2026

MalwareAnalyzer by Cyble scanned www.celso.org and returned a unknown verdict (score -12). The page resolved to 213.158.79.51 on REGISTER S.P.A. in BE. The domain was registered 8033 days ago through Register SpA. 1 domain and 1 IP were contacted. 3 malware samples communicate with this URL (Phishing). The request followed 1 redirect before landing. This is a point-in-time observation from 20 Aug 2026; the page may have changed since.

Scan result

Verdict: unknown (score -12) · Confidence 15%
Scanned URL: http://www.celso.org/download/buwinuxatu.pdf
Domain: www.celso.org · IP: 213.158.79.51 · AS34762 · BE
Server: nginx
Page title: 404 Not Found
HTTP status: 404 · text/html; charset=iso-8859-1
Registrar: Register SpA · domain age 8033 days · created 2004-08-21
TLS issuer: C=US, O=Let's Encrypt, CN=YR1 · valid to Oct 12 13: · subject CN=celso.org
Scan tier: standard · observed 2026-08-20 08:55:49 UTC

Redirect chain

http://www.celso.org/download/buwinuxatu.pdf
https://www.celso.org/download/buwinuxatu.pdf

Malware communicating with this URL (3)

These samples were observed contacting or being served from www.celso.org. Each links to its full analysis.

Phishing - referenced · 5ba25210f890fc56e2601085e60225bc · first seen 2026-08-20
Phishing - referenced · 974d32a988ddc9dbbc1b3ac9cb507b3d · first seen 2026-08-13
Phishing - referenced · 61f4db87f27ae24de12af5bb86dfd6fa · first seen 2026-08-12

Antivirus & YARA (0 of 47 engines)

No engine flagged this page's content.

Why this verdict

Valid TLS, no impersonation or off-origin credential post

Detected technologies

Nginx

Contacted infrastructure

213.158.79.51 - AS34762 REGISTER S.P.A. (Belgium)

Observed indicators

www.celso.org
213.158.79.51
https://www.celso.org/download/buwinuxatu.pdf

Other scans of www.celso.org (5)

This host has been scanned before. Each scan is a separate observation, so a verdict here does not carry over to the others.

20 Aug 2026 - unknown
20 Aug 2026 - unknown · https://www.celso.org/download/kumukatis.pdf
13 Aug 2026 - unknown · http://www.celso.org/download/xelekemigivofiwemol.pdf
13 Aug 2026 - unknown · http://www.celso.org/download/xelekemigivofiwemol.pdf
13 Aug 2026 - unknown · http://www.celso.org/download/xelekemigivofiwemol.pdf

Questions about www.celso.org

Is www.celso.org safe?: The scan of www.celso.org on 20 Aug 2026 reached no verdict either way (score -12). Too little was captured to judge it, which is an unknown rather than a pass.
What malware is associated with www.celso.org?: 3 analysed samples communicate with this URL, including Phishing.
How was www.celso.org checked?: A static pass resolved DNS, captured TLS and headers and followed the redirect chain, and where the standard tier allows, a headless browser rendered the page and recorded every request. Egress is SSRF-locked. Signatures that matched only page text are weighted far below one that matched a served file, because a page documenting malware matches the same rules.

Scanned at the standard tier - see how URL scanning works.

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