I have no idea what structure you're trying to achieve here. Assuming you want counts of passed/failed case and req URL's: 
use Data::Dumper;
use strict;
use warnings;

my (%counts, $case, $req);

while (<DATA>) {
    chomp;
    if (m/\Q[Case-Url] - \E(.*)/) {
        $case = $1;
    }
    elsif (m/\Q[Req-URL ] - \E(.*)/) {
        $req = $1;
    }
    if (m/\*\*\*(Passed|Failed)\*\*\*/) {
        $counts{$1}{'case'}{$case}++;
        $counts{$1}{'req'}{$req}++;
    }
}

print Dumper(\%counts);

__DATA__
Execution start time 09/13/2013 02:43:55 pm

[Case-Url] - www.google.com


[Req-URL ] - www.qtp.com


***Passed***
__________________________________________________________

[Case-Url] - www.yahoo.com


[Req-URL ] - www.msn.com


***Passed***

___________________________________________________________

[Case-Url] - www.google.com


[Req-URL ] - www.qtp.com


***Failed***

[download]
Output: 
$VAR1 = {
          'Passed' => {
                        'req' => {
                                   'www.qtp.com' => 1,
                                   'www.msn.com' => 1
                                 },
                        'case' => {
                                    'www.google.com' => 1,
                                    'www.yahoo.com' => 1
                                  }
                      },
          'Failed' => {
                        'req' => {
                                   'www.qtp.com' => 1
                                 },
                        'case' => {
                                    'www.google.com' => 1
                                  }
                      }
        };

[download]

In reply to Re: perl regex extraction from a large input file by TJPride
in thread perl regex extraction from a large input file by Anonymous Monk

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