import fitz

src_pdf = 'Plantilla-Carpa-3x4,5m-Tela-Impermeable.pdf'
out_pdf = 'borrador-sobre-plantilla.pdf'
logo_top = 'espailla-logo-gualda.png'
logo_bottom = 'pizarro-logo-blanco-transparente.png'

doc = fitz.open(src_pdf)
page = doc[0]
rect = page.rect

shape = page.new_shape()
shape.draw_rect(rect)
shape.finish(color=None, fill=(0.06, 0.23, 0.18))
shape.commit(overlay=False)

w = rect.width
h = rect.height
page.insert_image(fitz.Rect(w*0.34, h*0.05, w*0.66, h*0.22), filename=logo_top, keep_proportion=True, overlay=True)
page.insert_image(fitz.Rect(w*0.32, h*0.82, w*0.68, h*0.92), filename=logo_bottom, keep_proportion=True, overlay=True)

doc.save(out_pdf)
print('saved', out_pdf)