fix: Testing if some fields exist before trying to import them
fix: Testing if some fields exist before trying to import them

- Testing for pe itself, pe versions and pe signature

VirusTotal/misp-modules,MISP/misp-modules,MISP/misp-modules,amuehlem/misp-modules,amuehlem/misp-modules,VirusTotal/misp-modules,amuehlem/misp-modules,VirusTotal/misp-modules,MISP/misp-modules