Suspect 'invoice' mail showing an interesting error / 2015-12-16

The flood keeps coming, this time with an interesting error:

Dear Customer,

Our records show that your account has a debt of $295.{rand(10,99)}}. Previous a
ttempts of collecting this sum have failed.

Down below you can find an attached file with the information on your case.

[-- Attachment #2: SCAN_INVOICE_99193061.zip --]

I guess the spammer had a bit of a problem with the spamming macro language!

The .zip file contains

  Length      Date    Time    Name
---------  ---------- -----   ----
    22333  2015-12-16 20:27   invoice_GeL0XY.js
---------                     -------
    22333                     1 file

Which is a really obfuscated javascript.