Hello

I have posted on nextcloud GIT this issue and they pointed me here.

Here is the issue I have posted - https://github.com/nextcloud/files_pdfviewer/issues/508

Configuration

Web browser and its version: Google Chrome, ver.94.0.4606.81 x64
Operating system and its version: Windows 10, 21H1, build 19043.1288
PDF.js version: v2.9.359
Is a browser extension: no I dont use it as extension

Steps to reproduce the problem:

What is the expected behavior?
Shared PDF created in AutoCAD without borders

![Snímek obrazovky 2021-10-19 120908](https://user-images.githubusercontent.com/11374526/137889425-c0983b5c-a557-46dc-ac32-d50c1dbb9ea9.png)

What went wrong?
Shared PDF created in AutoCAD is with border...
![image](https://user-images.githubusercontent.com/11374526/137888031-11852e03-41a4-48a0-bc0a-3ba0d65bd912.png)

Link to a viewer (if hosted on a site other than mozilla.github.io/pdf.js or as Firefox/Chrome extension):
https://cloud.ostritecky.cz/s/cryrqKarK9CEam8

PDF viewer rendering border around text and objects when creating files with AutoCAD and It looks really bad. Is there a way to switch it off ?

Testfile here:

[Test.pdf](https://github.com/mozilla/pdf.js/files/7372181/Test.pdf)

const appearanceStream = new StringStream(buffer.join(" "));
    appearanceStream.dict = appearanceStreamDict;
    formDict.set("Fm0", appearanceStream);
    const gsDict = new Dict(xref);
    if (blendMode) {
      gsDict.set("BM", Name.get(blendMode));
    }
    if (typeof strokeAlpha === "number") {
      gsDict.set("CA", strokeAlpha);
    }
    if (typeof fillAlpha === "number") {
      gsDict.set("ca", fillAlpha);
    }
    const stateDict = new Dict(xref);
    stateDict.set("GS0", gsDict);
    const resources = new Dict(xref);
    resources.set("ExtGState", stateDict);
    resources.set("XObject", formDict);
    const appearanceDict = new Dict(xref);
    appearanceDict.set("Resources", resources);
    const bbox = (this.data.rect = [minX, minY, maxX, maxY]);
    appearanceDict.set("BBox", bbox);
    this.appearance = new StringStream("/GS0 gs /Fm0 Do");
    this.appearance.dict = appearanceDict;
    
    
    this._streams.push(this.appearance, appearanceStream);
  }
}
class WidgetAnnotation extends Annotation {