PDFProThumbnailHandler_x64.dll threat report

• » File
• File Details
• Overview
• Analysis

Analyst brief

What this report says

GridinSoft Anti-Malware detects PDFProThumbnailHandler_x64.dll as Adware.Gen. The sample was last observed on 2026-05-06 23:02:00 (3 weeks ago). This detection belongs to the Adware report group, where related files are organized by family-level behavior and prevalence.

This page combines the detection verdict with file identity, publisher metadata, alternate names, observed paths, geography, OS signals, and PE details so the report reads as a triage record rather than a standalone download page.

GridinSoft Anti-Malware detection

Detected by GridinSoft before you download

The current ThreatInfo record shows this exact file hash detected as Adware.Gen. Download GridinSoft Anti-Malware to scan the device, confirm whether this file is present, and remove the detected object if it is found.

Detection name

Adware.Gen

Recommended action

Scan and remove

Last analysis

2026-05-06 23:02:00 (3 weeks ago)

File hash

4bc85ef8dd444dc753ac4b95c1f3f757

Download Anti-Malware

Why it matters

Why GridinSoft flags this file

Detection

GridinSoft identifies the sample as Adware.Gen, part of the Adware threat category.

Category context

Programs that inject advertising, change browser behavior, or monetize traffic through bundled components. Related Adware reports help compare this file with nearby detections, publishers, and hashes.

Timeline

First seen 2026-05-06 23:01:13 (3 weeks ago); latest analysis 2026-05-06 23:02:00 (3 weeks ago).

Digital signature

Signed by PDF Pro Limited. The signature is reported as valid, but signed files can still be bundled or abused.

Observed locations

ThreatInfo has seen this file in user or system paths listed below. Unexpected locations increase the need for local verification.

Recommended action

What to do next

1. Compare the MD5 above with the file found on the device.
2. Check whether the file appears in the observed locations or under one of the alternate names.
3. Run GridinSoft Anti-Malware to confirm the detection and remove the file if it is present. Review the Adware category for related samples and common context.

PDFProThumbnailHandler_x64.dll is a Windows file recorded in the ThreatInfo database. The current detection status is Adware.Gen, based on the latest analysis from 2026-05-06 23:02:00 (3 weeks ago). ThreatInfo groups this verdict with Adware reports for broader family-level investigation.

If PDFProThumbnailHandler_x64.dll appears on your computer unexpectedly, treat it as suspicious. Check its location, digital signature, and recent system changes before allowing it to run. A full anti-malware scan is recommended when this file is detected as Adware.Gen.

File Details

The screenshot is a visual record of a GridinSoft Anti-Malware detection for this sample. Use the hash and metadata above as the primary identifiers when comparing the file on your system.

Overview

The signature on PDFProThumbnailHandler_x64.dll is reported as valid. A valid signature helps confirm publisher identity, but it does not automatically make the file safe if the installer was bundled, abused, or downloaded from an untrusted source.

ThreatInfo has observed PDFProThumbnailHandler_x64.dll in the locations listed above. Files found in temporary folders, user profile folders, startup locations, or unusual application directories should be reviewed more carefully than files installed under a known program directory.

Geographic signal

Observed country distribution

ThreatInfo has seen PDFProThumbnailHandler_x64.dll across 1 countries. Use this signal to compare local evidence with where the sample is most often reported.

Top country United States

Share 100.0%

Low High activity

The strongest geographic signal for this file is United States with 100.0% of observed hits. Geographic distribution can help identify targeted campaigns, regional software bundles, or where a file is most commonly reported.

The most common operating system signal for PDFProThumbnailHandler_x64.dll is Windows 10 with 100.0% of observed hits. If your system differs from the common profile, check whether the file was introduced by a specific installer, archive, or removable device.

Analysis

PDFProThumbnailHandler_x64.dll is identified as pe for 64-bit systems. The subsystem is Windows GUI. PE header values are useful for triage, especially when they do not match the expected publisher, product, or release timeline.

PE section names and hashes can reveal packing, injected resources, or unusual build artifacts. Sections with uncommon names, very large raw data, or hashes that differ from a trusted copy deserve additional review.

Report conclusion

GridinSoft detects this file as Adware.Gen

This report identifies PDFProThumbnailHandler_x64.dll by MD5 4bc85ef8dd444dc753ac4b95c1f3f757. It is part of the Adware report group. If the same file is present on your device, scan the system and remove the detected object after confirming the hash and location.

Download GridinSoft Anti-Malware Scan the device and confirm whether this exact hash is present. Check this hash on VirusTotal

Recommended next steps

• Compare the local file MD5 with 4bc85ef8dd444dc753ac4b95c1f3f757.
• Check the file path, publisher, and signature against the details in this report.
• Run a GridinSoft scan and remove the object if the same hash is found. Use the Adware category to compare similar reports.