Ransomware Research

OhNo-FakePDF Ransomware

OhNo-FakePDF is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on June 1, 2020, this ransomware has been actively targeting systems worldwide.

Quick facts

Ransomware Family
OhNo-FakePDF
First Seen
June 1, 2020

How OhNo-FakePDF ransomware works

File encryption patterns

OhNo-FakePDF modifies encrypted files using specific patterns to mark them as encrypted:

Extensions added after encryption
./\.[a-z0-9]{4,8}$/

Ransom note and payment demands

After encrypting files, OhNo-FakePDF displays ransom notes demanding payment for file recovery:

file/[a-z0-9]{4,8}-readme\.txt$/
notes/qag25h-readme.txt
Location: EveryFolder

Technical indicators

Associated executable files

The following executable files are associated with OhNo-FakePDF ransomware:

About this analysis

This OhNo-FakePDF ransomware analysis is part of Elastio's comprehensive ransomware detection database. Elastio provides advanced ransomware protection and recovery, helping organizations defend against and recover from ransomware attacks like OhNo-FakePDF.

Last updated: December 30, 2025

Detection coverage

Elastio detects OhNo-FakePDF inside your data and backups.

The Hunt Engine uses Deep File Inspection to identify OhNo-FakePDF across live data, replicated data, and backups. If this family is in your environment, Elastio finds it before encryption completes. Run a scan against your recovery points to confirm.

See How the Hunt Engine WorksRequest a Demo

Recent ransomware

Explore other threats in our database

Wxlongda2025VeilCrypt2025TitanLabooboo2025SolidBit2022SnapHackLocker2024PySystemUpdate2025PySimCrypt2025Monkey2025Lol2025HWID2025
View all ransomware →