use PDF::API2;
$pdf = PDF::API2->new;
$fnt = $pdf->corefont('Helvetica-Bold');
$page = $pdf->page;
$page->mediabox('A4');
$gfx = $page->gfx;
$gfx->textlabel(200,700,$fnt,20,'Hello World !');
$pdf->saveas('/this/new/document.pdf');
$pdf->end;