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Verdict Suspicious

Analyzed , 1 month ago

Is paperline.exe safe? Treat it as suspicious.

Two smaller engines flag the file as PUP/ApplicUnwnt while 16 major antivirus engines remain silent.

Why Suspicious? 2 antivirus engines flag it, but no major engine agrees; nothing else confirms it.

Limited evidence · One sign points to a problem; nothing else confirms it.

Don't run it until you know where it came from

If it came from a link, an attachment or a stranger, delete it.

What to do now4 steps

Some signs point to a problem, but nothing confirms it is harmful. Treat it with caution.

What to do

  1. Don't run it unless you're sure where it came from.

  2. Check where you got it: an unexpected attachment, a link someone sent you or a re-upload is a red flag.

  3. If you can't confirm where it came from, delete it. If you need the program, download it again from the publisher's own website.

If you already ran it

  1. Stop using it, run a full scan with your antivirus and watch for unexpected behavior or security alerts.

Not sure what to do?

Ask the MalwareTips community before you run it. If you already ran it, follow the cleanup guide.

Paste this report's link in your topic so helpers can see what was found.

Why we think so

Share this file report

paperline.exe: Suspicious — MalwareTips file scan

The link always shows the latest result for this exact file (its SHA-256 fingerprint).

Reads the latest antivirus results for this file's hash. Nothing is uploaded.

Antivirus results

2 of 70 flagged

  • Flagged 2
  • No detection 68
  • No result 5
Filepaperline.exe7.9 MBSHA-256 7f1db334fd33…3d73c3
  • Code signing Guangzhou Guoying Communication Technology Co.
  • Test run Completed
  • First seen 3mo ago
2 of the 70 antivirus engines that checked it flag it, including Malwarebytes and Xcitium.

Chapter 02

Why we think so

2 points against it and 2 in its favour, checked against the scan evidence.

MT AI Engine · Verdict analysis

The reasoning behind this verdict

Analyst conclusion

The file is signed but the signer has no prior history in our database. Two smaller engines label it PUP.Optional.XLine and ApplicUnwnt, while the remaining 68 engines report clean. Prevalence is medium and no similar-hash matches exist, leaving the evidence balanced between a potentially unwanted application and an unknown threat.

Where this verdict could be wrong2 caveats
  • contactedHosts.inspected=1, maliciousHosts.length=0 — no complete contacted-host reputation result was available in our cache
  • No dropped file is known to be malicious — both files it created returned unknown verdicts

These are the assessment's weak points. If you believe one applies to your file, report the verdict and we'll re-review it.

6 sources checked · 5 complete · 1 partial. See every source

Chapter 03

What it did in our test

It ran in our isolated test environment; no test environment rated what it did as risky.

Test run summary

Capture complete
  • 10sandbox rule tags
  • 2spawned processes
  • 4network contacts
  • 3filesystem & mutex artifacts

What the test run showed

What the file did on a test computer

Confirmed in the test run

  • Moderate concern: Contains packed or scrambled code that is harder to inspect (common in installers too).

  • Note: Talked to servers over the internet during the test run.

  • Note: Read basic details of the test computer, such as its Windows version.

Sandbox labels we could not confirm (common in safe files too)

  • Not confirmed: A sandbox rule tagged this run as code injection, but no injected program was recorded.

  • Not confirmed: A sandbox rule tagged this run as recording keystrokes; no keylogging was confirmed.

  • Not confirmed: A sandbox rule tagged this run as weakening security settings; no setting change was recorded.

  • Not confirmed: A sandbox rule tagged this run as changing how Windows loads code; nothing confirms it.

This file was run on a test computer (a sandbox), not on yours. Labels we could not confirm are listed so you can see them, but they are not treated as evidence against the file.

Recorded behavior

What happened in the test

Grouped by step. The order is not a timeline.

Seen in the test runWorked out from other results

  1. Input file

    The submitted object

    1
    1. Evidence 1 of 7: FileSeen in the test run

      paperline.exe

      7f1db334fd3302cf98dd4afddf6f90e98e2a496fe7e86bf1832b89d02f3d73c3

      Uploaded file

  2. Processes

    What ran

    2
    1. Evidence 2 of 7: ProcessSeen in the test run

      quartzline.exe

      "C:\Users\<USER>\Desktop\quartzline.exe"

      Test run
    2. Evidence 3 of 7: ProcessSeen in the test run

      quartzline.exe

      "C:\Users\user\Desktop\quartzline.exe"

      Test run
    3. +1 more recorded observation

  3. Files

    Created or changed

    2
    1. Evidence 4 of 7: Written fileSeen in the test run

      terrain.dat

      C:\Users\<USER>\AppData\Local\QuartzLine\terrain.dat

      Test run
    2. Evidence 5 of 7: Written fileSeen in the test run

      QuartzLine

      C:\Users\user\AppData\Local\QuartzLine

      Test run
    3. +1 more recorded observation

  4. Network

    Hosts contacted

    2
    1. Evidence 6 of 7: Contacted hostSeen in the test run

      104.21.84.219

      Contacted during the test run.

      Test run
    2. Evidence 7 of 7: Contacted hostSeen in the test run

      172.67.197.98

      Contacted during the test run.

      Test run
    3. +1 more recorded observation

7 facts from the test run. See the full activity list.

Chapter 04

Technical details

2 of the 70 antivirus engines that checked it flag it; signed by Guangzhou Guoying Communication Technology Co..

Sources checked

Every check behind this verdict

6 sources checked · 5 complete · 1 partial. Complete means the check returned a usable result; it does not mean the file is safe.

SourceStatusResultChecked
Antivirus enginesVirusTotal · 75 enginesCompleteRisk signal: 2 of 70 engines flagged it · 5 gave no result Details for antivirus engines
Sandbox runVirusTotal sandboxesCompleteRuntime behaviour was recorded Details for sandbox run
Contacted hostsMalwareTips URL scannerPartial1 of 4 contacted hosts were cross-checked; coverage is incomplete Details for contacted hosts
Signature rulesYARAify community rules + MalwareTips rulesComplete1 MalwareTips behaviour rule Details for signature rules
Malware sample databaseabuse.ch MalwareBazaarCompleteNot listed
Known-software referenceCIRCL hashlookupCompleteNo match

Engines that flagged it 2

  • MalwarebytesPUP.Optional.XLine
  • XcitiumApplicUnwnt@#1wqrkukilbt6z

File fingerprint

Last analyzed
Aug 30, 2026, 2:59 PM UTC
SHA-256
7f1db334fd3302cf98dd4afddf6f90e98e2a496fe7e86bf1832b89d02f3d73c3
SHA-1
3b00f51e00d8e10bf513414a13a4da96c4abfc32
MD5
d62d4b7811e37ce789b40ff9343e3458

About this file

paperline.exe is a Win32 EXE file of 7.9 MB.

Type and size
Win32 EXE · 7.9 MB
Signer
Guangzhou Guoying Communication Technology Co.Valid code signature.
First seen
Jul 13, 2026On VirusTotal.
Submitted by
8 distinct sourcesRarely seen: few people have submitted this exact file.
Packer
None detected
Entropy
7.61 of 8

First scanned Updated

Chapter 05

Questions & answers

Short answers to the 7 questions people ask most about this file.

Is paperline.exe safe, or is it malware?
paperline.exe is rated Suspicious: some signs point to a problem, but nothing confirms it is harmful. 2 of the 70 antivirus engines that checked it flag it. Don't run it unless you're sure where it came from. If you need the program, download it again from the publisher's own website.
What is paperline.exe?
paperline.exe is a Windows program, about 7.9 MB. It carries no version information saying what it is or who made it. VirusTotal first saw it on Jul 13, 2026.
How many antivirus engines detected paperline.exe?
2 of the 70 antivirus engines that checked it flag paperline.exe, including Malwarebytes and Xcitium. We weigh which engines flagged it and what else the scan found, not just the count.
What should I do if I already ran paperline.exe?
No infection is confirmed: the rating is a caution, not a malware finding. 1) Check where it came from. If you can't confirm the source, delete it. 2) Run a full scan with your security software. 3) If the scan finds something, follow its removal steps and change passwords you typed on the device since then.
Is paperline.exe digitally signed?
Yes. paperline.exe has a valid digital signature from Guangzhou Guoying Communication Technology Co., which shows the file hasn't been changed since that publisher signed it. Malware is sometimes signed with stolen certificates, so a signature alone isn't proof of safety.
What is the SHA-256 hash of paperline.exe?
The SHA-256 fingerprint of paperline.exe is 7f1db334fd3302cf98dd4afddf6f90e98e2a496fe7e86bf1832b89d02f3d73c3, and its MD5 is d62d4b7811e37ce789b40ff9343e3458. Two files with the same SHA-256 are identical, so use it to check you have exactly this file, not just one with the same name.
How up to date is this analysis of paperline.exe?
This report reflects the scan on Aug 30, 2026. A file's fingerprint never changes, but antivirus engines keep learning, so a rating can change later. To get a newer result, scan the file again: we refresh the antivirus results when the saved ones are out of date.
Chapter 06

Community

Member reviews and reports for this exact file hash.

Related file reports

Recent reports on other files with the same rating.

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This report and its SHA-256 fingerprint are public, so the next person who checks the same file gets an instant answer; documents and images are listed by type instead of their file name. A file we had not seen before is uploaded to VirusTotal, whose security partners and subscribers can download it; MalwareTips deletes its own copy after the scan. If you ran this file and are worried, scan your device with up-to-date security software.