page.extract_text() returns IndexError: list index out of range

[TripleStrike]

Hi I'd like to extract text from PDF to CSV but I can't even get text from PDF. The PDF file does not have any security, but it contains Thai text.

import PyPDF2
import csv

pdf_files = 'no_sec.pdf'

with open(pdf_files, mode='rb') as f:
    reader = PyPDF2.PdfReader(pdf_files)
    reader.pages[0].extract_text()

The error is

 IndexError: list index out of range at nbi = max(len(lst[0]), len(lst[1])):
Traceback (most recent call last):
  File "C:\Users\Smith-Thinkpad\Downloads\pdf_to_excel\pdf_to_csv_v0.py", line 34, in <module>
    reader.pages[0].extract_text()
  File "C:\Users\Smith-Thinkpad\AppData\Local\Programs\Python\Python311\Lib\site-packages\PyPDF2\_page.py", line 1825, in extract_text
    return self._extract_text(
  File "C:\Users\Smith-Thinkpad\AppData\Local\Programs\Python\Python311\Lib\site-packages\PyPDF2\_page.py", line 1325, in _extract_text
    cmaps[f] = build_char_map(f, space_width, obj)
  File "C:\Users\Smith-Thinkpad\AppData\Local\Programs\Python\Python311\Lib\site-packages\PyPDF2\_cmap.py", line 28, in build_char_map
    map_dict, space_code, int_entry = parse_to_unicode(ft, space_code)
  File "C:\Users\Smith-Thinkpad\AppData\Local\Programs\Python\Python311\Lib\site-packages\PyPDF2\_cmap.py", line 196, in parse_to_unicode
    process_rg, process_char, multiline_rg = process_cm_line(
  File "C:\Users\Smith-Thinkpad\AppData\Local\Programs\Python\Python311\Lib\site-packages\PyPDF2\_cmap.py", line 264, in process_cm_line
    multiline_rg = parse_bfrange(l, map_dict, int_entry, multiline_rg)
  File "C:\Users\Smith-Thinkpad\AppData\Local\Programs\Python\Python311\Lib\site-packages\PyPDF2\_cmap.py", line 278, in parse_bfrange
    nbi = max(len(lst[0]), len(lst[1]))
IndexError: list index out of range

Could anyone point out what I did incorrect here? Thank you

[pubpub-zz]

Can you please provide a failing PDF fille for analysis?