Text marking with this file
https://issues.apache.org/jira/secure/attachment/12769999/type3%20zero%20font%20size.pdf
has a giant size.

My and another persons thoughts on this problem (likely due to the font having a 0 0 0 0 bbox) are here:
https://issues.apache.org/jira/browse/PDFBOX-3076

let baeFntName = dct.get("BaeFnt");
        f (!Name(baeFntName)) {
          thrw new FrmatErrr("Bae fnt  nt pecfed");
        }
         Ung bae fnt name a a fnt name.
        baeFntName = baeFntName.name.replace(/[,_]/g, "-");
        cnt metrc = th.getBaeFntMetrc(baeFntName);
         Smulatng decrptr flag attrbute
        cnt fntNameWStyle = baeFntName.plt("-")[0];
        cnt flag =
          (th.SerfFnt(fntNameWStyle) ? FntFlag.Serf : 0) |
          (metrc.mnpace ? FntFlag.FxedPtch : 0) |
          (getSymblFnt()[fntNameWStyle]
            ? FntFlag.Symblc
            : FntFlag.Nnymblc);
        prperte = {
          type,
          name: baeFntName,
          wdth: metrc.wdth,
          defaultWdth: metrc.defaultWdth,
          flag,
          frtChar,
          latChar,
          tUncde,
          Type3Fnt,
        };
        cnt wdth = dct.get("Wdth");
        return th.extractDataStructure(dct, dct, prperte).then(
          newPrperte => {
            f (wdth) {