| URL: | b.pdf-fast.com |
| Full analysis: | https://app.any.run/tasks/0edcab6a-0c97-48b6-b683-b1ce6a805def |
| Verdict: | Malicious activity |
| Analysis date: | April 22, 2025, 13:11:08 |
| OS: | Windows 10 Professional (build: 19044, 64 bit) |
| Tags: | |
| Indicators: | |
| MD5: | 95D1B0EDA8491DB48DA66C85BAC654C1 |
| SHA1: | BA980B868EA548C16BA41B25D33C7A3CBF177EB2 |
| SHA256: | DE0113CC975D6D5A1C941AFEA00AB54022C176A97AA8F921C8CD4542649DDBA6 |
| SSDEEP: | 3:3a8:K8 |
MALICIOUS
No malicious indicators.SUSPICIOUS
Executable content was dropped or overwritten
- PDFast.exe (PID: 1096)
- rundll32.exe (PID: 7692)
- rundll32.exe (PID: 684)
- rundll32.exe (PID: 1672)
- rundll32.exe (PID: 6044)
Process drops legitimate windows executable
- PDFast.exe (PID: 1096)
ADVANCEDINSTALLER mutex has been found
- PDFast.exe (PID: 1096)
Reads the Windows owner or organization settings
- msiexec.exe (PID: 5668)
- PDFast.exe (PID: 1096)
INFO
Checks supported languages
- identity_helper.exe (PID: 5972)
- msiexec.exe (PID: 5668)
- PDFast.exe (PID: 1096)
- msiexec.exe (PID: 3900)
- msiexec.exe (PID: 1012)
Application launched itself
- msedge.exe (PID: 4880)
Executable content was dropped or overwritten
- msedge.exe (PID: 4880)
- msedge.exe (PID: 7328)
- msiexec.exe (PID: 5668)
Reads the computer name
- PDFast.exe (PID: 1096)
- identity_helper.exe (PID: 5972)
- msiexec.exe (PID: 1012)
- msiexec.exe (PID: 3900)
- msiexec.exe (PID: 5668)
Reads Environment values
- PDFast.exe (PID: 1096)
- identity_helper.exe (PID: 5972)
- msiexec.exe (PID: 1012)
The sample compiled with english language support
- msedge.exe (PID: 7328)
- PDFast.exe (PID: 1096)
- msiexec.exe (PID: 5668)
- msedge.exe (PID: 4880)
Reads the machine GUID from the registry
- PDFast.exe (PID: 1096)
- msiexec.exe (PID: 5668)
Creates files or folders in the user directory
- PDFast.exe (PID: 1096)
- msiexec.exe (PID: 5668)
Reads the software policy settings
- PDFast.exe (PID: 1096)
- msiexec.exe (PID: 5668)
- rundll32.exe (PID: 7692)
- msiexec.exe (PID: 5256)
Create files in a temporary directory
- rundll32.exe (PID: 7692)
- rundll32.exe (PID: 1672)
- rundll32.exe (PID: 684)
- rundll32.exe (PID: 6044)
Disables trace logs
- rundll32.exe (PID: 7692)
Creates a software uninstall entry
- msiexec.exe (PID: 5668)
Checks proxy server information
- rundll32.exe (PID: 6044)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
Total processes
185
Monitored processes
55
Malicious processes
1
Suspicious processes
2
Behavior graph
Click at the process to see the details
Process information
PID | CMD | Path | Indicators | Parent process | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 472 | "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=quarantine.mojom.Quarantine --lang=en-US --service-sandbox-type=none --no-appcompat-clear --mojo-platform-channel-handle=7300 --field-trial-handle=2244,i,16764625562089971165,368409997574026496,262144 --variations-seed-version /prefetch:8 | C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe | — | msedge.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Microsoft Edge Exit code: 0 Version: 122.0.2365.59 Modules
| |||||||||||||||
| 616 | "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --lang=en-US --service-sandbox-type=service --no-appcompat-clear --mojo-platform-channel-handle=6952 --field-trial-handle=2244,i,16764625562089971165,368409997574026496,262144 --variations-seed-version /prefetch:8 | C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe | — | msedge.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: LOW Description: Microsoft Edge Exit code: 0 Version: 122.0.2365.59 Modules
| |||||||||||||||
| 684 | rundll32.exe "C:\WINDOWS\Installer\MSI5700.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_1136578 59 RequestSender!RequestSender.CustomActions.CreateScheduledTask | C:\Windows\SysWOW64\rundll32.exe | msiexec.exe | ||||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Windows host process (Rundll32) Exit code: 0 Version: 10.0.19041.3636 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 1012 | C:\Windows\syswow64\MsiExec.exe -Embedding 0FC784C4EDC729833CBA4BC738C46E05 C | C:\Windows\SysWOW64\msiexec.exe | — | msiexec.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Windows® installer Exit code: 0 Version: 5.0.19041.3636 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 1040 | "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --lang=en-US --service-sandbox-type=none --no-appcompat-clear --mojo-platform-channel-handle=7572 --field-trial-handle=2244,i,16764625562089971165,368409997574026496,262144 --variations-seed-version /prefetch:8 | C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe | — | msedge.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Microsoft Edge Exit code: 0 Version: 122.0.2365.59 Modules
| |||||||||||||||
| 1096 | "C:\Users\admin\Downloads\PDFast.exe" | C:\Users\admin\Downloads\PDFast.exe | msedge.exe | ||||||||||||
User: admin Company: PDFast Integrity Level: MEDIUM Description: PDFast Installer Exit code: 0 Version: 1.0.0 Modules
| |||||||||||||||
| 1184 | "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --lang=en-US --service-sandbox-type=service --no-appcompat-clear --mojo-platform-channel-handle=6416 --field-trial-handle=2244,i,16764625562089971165,368409997574026496,262144 --variations-seed-version /prefetch:8 | C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe | — | msedge.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: LOW Description: Microsoft Edge Exit code: 0 Version: 122.0.2365.59 Modules
| |||||||||||||||
| 1616 | "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --no-appcompat-clear --disable-gpu-compositing --lang=en-US --js-flags=--ms-user-locale= --device-scale-factor=1 --num-raster-threads=2 --enable-main-frame-before-activation --renderer-client-id=30 --mojo-platform-channel-handle=6616 --field-trial-handle=2244,i,16764625562089971165,368409997574026496,262144 --variations-seed-version /prefetch:1 | C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe | — | msedge.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: LOW Description: Microsoft Edge Version: 122.0.2365.59 Modules
| |||||||||||||||
| 1672 | rundll32.exe "C:\WINDOWS\Installer\MSI5EF0.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_1138453 64 RequestSender!RequestSender.CustomActions.OpenUrl | C:\Windows\SysWOW64\rundll32.exe | msiexec.exe | ||||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Windows host process (Rundll32) Exit code: 0 Version: 10.0.19041.3636 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 2088 | "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=chrome.mojom.UtilReadIcon --lang=en-US --service-sandbox-type=icon_reader --no-appcompat-clear --mojo-platform-channel-handle=7560 --field-trial-handle=2244,i,16764625562089971165,368409997574026496,262144 --variations-seed-version /prefetch:8 | C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe | — | msedge.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: LOW Description: Microsoft Edge Exit code: 0 Version: 122.0.2365.59 Modules
| |||||||||||||||
Total events
27 731
Read events
27 555
Write events
164
Delete events
12
Modification events
| (PID) Process: | (4880) msedge.exe | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\EdgeUpdate\ClientStateMedium\{56EB18F8-B008-4CBD-B6D2-8C97FE7E9062}\LastWasDefault |
| Operation: | write | Name: | S-1-5-21-1693682860-607145093-2874071422-1001 |
Value: AD6CC700F4912F00 | |||
| (PID) Process: | (4880) msedge.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowProperties\197390 |
| Operation: | write | Name: | WindowTabManagerFileMappingId |
Value: {EB19A2A5-9DAC-4EA4-88A1-273A4F609303} | |||
| (PID) Process: | (4880) msedge.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowProperties\197390 |
| Operation: | write | Name: | WindowTabManagerFileMappingId |
Value: {A2D94395-FBF4-4C83-9282-1C8028462311} | |||
| (PID) Process: | (4880) msedge.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Microsoft\Edge\BLBeacon |
| Operation: | write | Name: | failed_count |
Value: 0 | |||
| (PID) Process: | (4880) msedge.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Microsoft\Edge\BLBeacon |
| Operation: | write | Name: | state |
Value: 2 | |||
| (PID) Process: | (4880) msedge.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Microsoft\Edge\BLBeacon |
| Operation: | write | Name: | state |
Value: 1 | |||
| (PID) Process: | (4880) msedge.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Microsoft\Edge\StabilityMetrics |
| Operation: | write | Name: | user_experience_metrics.stability.exited_cleanly |
Value: 0 | |||
| (PID) Process: | (4880) msedge.exe | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\EdgeUpdate\ClientStateMedium\{56EB18F8-B008-4CBD-B6D2-8C97FE7E9062}\LastWasDefault |
| Operation: | write | Name: | S-1-5-21-1693682860-607145093-2874071422-1001 |
Value: 3C44B200F4912F00 | |||
| (PID) Process: | (4880) msedge.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run |
| Operation: | write | Name: | MicrosoftEdgeAutoLaunch_29EBC4579851B72EE312C449CF839B1A |
Value: "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --no-startup-window --win-session-start | |||
| (PID) Process: | (4880) msedge.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Microsoft\Edge\Profiles |
| Operation: | write | Name: | EnhancedLinkOpeningDefault |
Value: Default | |||
Executable files
56
Suspicious files
116
Text files
37
Unknown types
0
Dropped files
PID | Process | Filename | Type | |
|---|---|---|---|---|
| 4880 | msedge.exe | C:\Users\admin\AppData\Local\Microsoft\Edge\User Data\Default\discounts_db\LOG.old~RF10bc0e.TMP | — | |
MD5:— | SHA256:— | |||
| 4880 | msedge.exe | C:\Users\admin\AppData\Local\Microsoft\Edge\User Data\Default\parcel_tracking_db\LOG.old~RF10bc0e.TMP | — | |
MD5:— | SHA256:— | |||
| 4880 | msedge.exe | C:\Users\admin\AppData\Local\Microsoft\Edge\User Data\Default\commerce_subscription_db\LOG.old~RF10bc0e.TMP | — | |
MD5:— | SHA256:— | |||
| 4880 | msedge.exe | C:\Users\admin\AppData\Local\Microsoft\Edge\User Data\Default\discounts_db\LOG.old | — | |
MD5:— | SHA256:— | |||
| 4880 | msedge.exe | C:\Users\admin\AppData\Local\Microsoft\Edge\User Data\Default\parcel_tracking_db\LOG.old | — | |
MD5:— | SHA256:— | |||
| 4880 | msedge.exe | C:\Users\admin\AppData\Local\Microsoft\Edge\User Data\Default\commerce_subscription_db\LOG.old | — | |
MD5:— | SHA256:— | |||
| 4880 | msedge.exe | C:\Users\admin\AppData\Local\Microsoft\Edge\User Data\Default\EdgePushStorageWithConnectTokenAndKey\LOG.old~RF10bc3d.TMP | — | |
MD5:— | SHA256:— | |||
| 4880 | msedge.exe | C:\Users\admin\AppData\Local\Microsoft\Edge\User Data\Default\PersistentOriginTrials\LOG.old~RF10bc3d.TMP | — | |
MD5:— | SHA256:— | |||
| 4880 | msedge.exe | C:\Users\admin\AppData\Local\Microsoft\Edge\User Data\Default\PersistentOriginTrials\LOG.old | — | |
MD5:— | SHA256:— | |||
| 4880 | msedge.exe | C:\Users\admin\AppData\Local\Microsoft\Edge\User Data\Default\EdgePushStorageWithConnectTokenAndKey\LOG.old | — | |
MD5:— | SHA256:— | |||
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
7
TCP/UDP connections
65
DNS requests
67
Threats
0
HTTP requests
PID | Process | Method | HTTP Code | IP | URL | CN | Type | Size | Reputation |
|---|---|---|---|---|---|---|---|---|---|
5496 | MoUsoCoreWorker.exe | GET | 200 | 184.30.21.171:80 | http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl | DE | binary | 868 b | whitelisted |
5556 | SIHClient.exe | GET | 200 | 184.30.21.171:80 | http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Product%20Root%20Certificate%20Authority%202018.crl | DE | binary | 419 b | whitelisted |
5496 | MoUsoCoreWorker.exe | GET | 200 | 23.48.23.156:80 | http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl | DE | binary | 825 b | whitelisted |
6544 | svchost.exe | GET | 200 | 2.17.190.73:80 | http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBSAUQYBMq2awn1Rh6Doh%2FsBYgFV7gQUA95QNVbRTLtm8KPiGxvDl7I90VUCEAJ0LqoXyo4hxxe7H%2Fz9DKA%3D | DE | binary | 471 b | whitelisted |
5556 | SIHClient.exe | GET | 200 | 184.30.21.171:80 | http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Update%20Secure%20Server%20CA%202.1.crl | DE | binary | 407 b | whitelisted |
4880 | msedge.exe | GET | 200 | 104.18.21.226:80 | http://ocsp.globalsign.com/codesigningrootr45/MFEwTzBNMEswSTAJBgUrDgMCGgUABBQVFZP5vqhCrtRN5SWf40Rn6NM1IAQUHwC%2FRoAK%2FHg5t6W0Q9lWULvOljsCEHe9DgW3WQu2HUdhUx4%2Fde0%3D | unknown | binary | 1.67 Kb | whitelisted |
4880 | msedge.exe | GET | 200 | 104.18.21.226:80 | http://ocsp.globalsign.com/gsgccr45evcodesignca2020/ME0wSzBJMEcwRTAJBgUrDgMCGgUABBQaCbVYh07WONuW4e63Ydlu4AlbDAQUJZ3Q%2FFkJhmPF7POxEztXHAOSNhECDH02JuY%2BNRarIhFtHg%3D%3D | unknown | binary | 1.66 Kb | whitelisted |
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
Connections
PID | Process | IP | Domain | ASN | CN | Reputation |
|---|---|---|---|---|---|---|
5496 | MoUsoCoreWorker.exe | 23.48.23.156:80 | crl.microsoft.com | Akamai International B.V. | DE | whitelisted |
4 | System | 192.168.100.255:138 | — | — | — | whitelisted |
5496 | MoUsoCoreWorker.exe | 184.30.21.171:80 | www.microsoft.com | AKAMAI-AS | DE | whitelisted |
2104 | svchost.exe | 51.104.136.2:443 | — | MICROSOFT-CORP-MSN-AS-BLOCK | IE | whitelisted |
— | — | 51.104.136.2:443 | — | MICROSOFT-CORP-MSN-AS-BLOCK | IE | whitelisted |
4880 | msedge.exe | 239.255.255.250:1900 | — | — | — | whitelisted |
7328 | msedge.exe | 13.107.42.16:443 | config.edge.skype.com | MICROSOFT-CORP-MSN-AS-BLOCK | US | whitelisted |
7328 | msedge.exe | 150.171.30.11:443 | edge.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | US | whitelisted |
7328 | msedge.exe | 169.150.247.36:80 | b.pdf-fast.com | — | GB | malicious |
7328 | msedge.exe | 13.107.6.158:443 | business.bing.com | MICROSOFT-CORP-MSN-AS-BLOCK | US | whitelisted |
DNS requests
Domain | IP | Reputation |
|---|---|---|
crl.microsoft.com |
| whitelisted |
www.microsoft.com |
| whitelisted |
google.com |
| whitelisted |
config.edge.skype.com |
| whitelisted |
b.pdf-fast.com |
| malicious |
edge.microsoft.com |
| whitelisted |
business.bing.com |
| whitelisted |
edge-mobile-static.azureedge.net |
| whitelisted |
bzib.nelreports.net |
| whitelisted |
www.bing.com |
| whitelisted |