Chromedriver injected code.

[oleg-andreyev]

Chromedriver injects following code

https://github.com/bayandin/chromedriver/blob/63aae844b03abd89e1f47ca15b1721881d040d66/chrome/devtools_client_impl.cc#L563

(function () {window.cdc_adoQpoasnfa76pfcZLmcfl_Array = window.Array;window.cdc_adoQpoasnfa76pfcZLmcfl_Object = window.Object;window.cdc_adoQpoasnfa76pfcZLmcfl_Promise = window.Promise;window.cdc_adoQpoasnfa76pfcZLmcfl_Proxy = window.Proxy;window.cdc_adoQpoasnfa76pfcZLmcfl_Symbol = window.Symbol;window.cdc_adoQpoasnfa76pfcZLmcfl_JSON = window.JSON;window.cdc_adoQpoasnfa76pfcZLmcfl_Window = window.Window;}) ();
  const Window = window.cdc_adoQpoasnfa76pfcZLmcfl_Window || window.Window;
  const Symbol = window.cdc_adoQpoasnfa76pfcZLmcfl_Symbol || window.Symbol;
    const Array = window.cdc_adoQpoasnfa76pfcZLmcfl_Array || window.Array;
  const Proxy = window.cdc_adoQpoasnfa76pfcZLmcfl_Proxy || window.Proxy;
  let WindowProxy = window.cdc_adoQpoasnfa76pfcZLmcfl_Window || window.Window;
    const JSON = window.cdc_adoQpoasnfa76pfcZLmcfl_JSON || window.JSON;
  const Promise = window.cdc_adoQpoasnfa76pfcZLmcfl_Promise || window.Promise;
      const JSON = window.cdc_adoQpoasnfa76pfcZLmcfl_JSON || window.JSON;
  const Promise = window.cdc_adoQpoasnfa76pfcZLmcfl_Promise || window.Promise;
    const Promise = window.cdc_adoQpoasnfa76pfcZLmcfl_Promise || window.Promise;

using quite simple code:

function getCDC(){ 
    let matches = []
    for(let prop in window) {
       prop.match(/cdc_[a-z0-9]/ig) && matches.push(prop)
    }
    return matches 
}

we can detect it too.