1843905 - Download Protection: MKV files are marked as malware

Status: NEW

(Toolkit :: Safe Browsing, defect, P3)

Description

[erosman [:erosman]]

Recently, all downloaded .mkv files are incorrectly marked as malware.

Comment 1

[BugBot [:suhaib / :marco]]

The severity field is not set for this bug.
:dimi, could you have a look please?

For more information, please visit BugBot documentation.

Comment 2

[Dimi Lee [:dimi]]

Hi erosman, I tried several .mkv files but I cannot reproduce this issue.
Could you share the link of the files you fail to download with me? thanks you!

Comment 3

[erosman [:erosman]]

I have my suspicions about the reason (which I shared on Matrix).

Here are a few smallish random links for easy testing ...
(beware of the ads)

Let me know if they didn't cause the notice.

https://clicknupload.club/uy6xgtg86okq
https://clicknupload.download/0dhm6tz31qur
https://clicknupload.download/jg8v465lq98i

Comment 4

[BugBot [:suhaib / :marco]]

The severity field is not set for this bug.
:dimi, could you have a look please?

For more information, please visit BugBot documentation.

Comment 5

[Dimi Lee [:dimi]]

Hi erosman,
could you help test if .mkv files are still marked as malware? The first time i download the file (the link in Comment 3) the file is marked as malware, however, after i test again with Chrome, the issue doesn't occur anymore (even after i switch to Firefox to download the file again). Maybe Google fix it?

If .mkv files are still marked as malware in your environment, could you also help test downloading the file with Chrome? thanks!

Comment 6

[erosman [:erosman]]

• Downloaded https://clicknupload.club/uy6xgtg86okq
• Firefox marks it as malware
• "Allow download" was clicked
• Downloading with Chrome should not be condition, however...
  • Downloaded above with Chrome and Chrome gave no malware warning
    (Downloading with Chrome with no ad-blocker is a nightmare on that site)
• Re-downloaded above with Firefox
• Firefox marks it as malware

Note:
Chrome resolves duplicate filenames as *** (1).mkv while Firefox resolves as ***(1).mkv
Screenshots are available if needed.