Let's review the source of the page:
>view-source:http://blackfoxs.org/radar/easyweb/
```html
EasyWeb

```

Guessing:
```bash
curl http://blackfoxs.org/radar/easyweb/index.php\?secretword\=radar
```
> radar{e4zy_w3b_true_m0ve_on}


Original writeup (https://github.com/manulqwerty/CTF-Stuff/tree/master/RADARCTF/EasyWeb).