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HTPBE?

Structural PDF tamper detection API. Catches edits your KYC stack misses.

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Status

Algorithm v2.23.1

Tool profile

PScript5

PScript5 appears on both legitimate first-generation output and downstream re-save flows — context (the other tool on the same document) is what flips the signal.

Back to all statistics
Forensic verdict

Mixed signal

Based on 285 appearances across the HTPBE? corpus.

Modification rate
53%+5pp above baseline
Corpus baseline: 48%
Total appearances
285
1.4% of corpus
Modification rate
53%
+5pp above baseline
Role split
100%C/0%P
Creator vs Producer share of appearances

Corpus profile

How PScript5 shows up in HTPBE? corpus

PScript5 is one of the PDF-handling tools surfaced in the HTPBE? corpus. PScript5 appears predominantly as the original Creator (100% of its occurrences) — i.e. on documents that started life inside PScript5 rather than passing through it as a downstream re-saver.

In the HTPBE? corpus the contextual signal we look for is a producer/creator mismatch: when PScript5 appears as the latest Producer on a document whose Creator was an institutional source (e.g. Adobe PDF Library, Microsoft Word, a banking back-end), the document was rebuilt or re-saved after its original creation. That mismatch is the marker — never the tool itself.

On documents where PScript5 acts as Creator, 53% carry modification markers; on documents where it acts as Producer, 0% do. These are observed rates inside the HTPBE? corpus and should be read as base-rates, not as accusations against PScript5 or its users.

The signal
In the HTPBE? corpus the contextual signal we look for is a producer/creator mismatch: when PScript5 appears as the latest Producer on a document whose Creator was an institutional source (e.g. Adobe PDF Library, Microsoft Word, a banking back-end), the document was rebuilt or re-saved after its original creation. That mismatch is the marker — never the tool itself.

Role in the workflow

How PScript5 shows up in metadata

Every PDF carries a Creator (the application that produced the original document) and a Producer (the engine that wrote the PDF). The same tool can appear in either slot, with very different modification profiles.

CAs Creator · 100%
As Producer · 0%P
CAs Creator
  • Usage
    285
  • Modification rate
    53%
  • Avg file size
    620 KB
PAs Producer
  • Usage
    0
  • Modification rate
    0%

How to read this

The Creator slot typically reflects where a document started life. The Producer slot reflects whatever wrote the bytes — and is the field that gets overwritten when a PDF is opened, edited, and saved by a downstream tool.

A higher modification rate as Producer than as Creator usually means the tool is acting as a re-saver on documents that originated elsewhere. A higher rate as Creator points to fragile workflows around the original authoring app.

Distributions

What ships alongside PScript5

The PDF versions PScript5 writes when acting as Producer, and the other tools that appear in the same documents.

Common Producers when PScript5 is the Creator

Acrobat Distiller writes 97% of these files — that pairing is the Adobe-stack default for many institutional pipelines.

Acrobat Distiller97.2%
GPL Ghostscript1.8%

Related profiles

Tools you’ll see next to PScript5

Other tools that frequently share metadata with PScript5 in the same documents. Each card links to its own forensic profile.

P97% co-occurrence
Acrobat Distiller
Appearances303
Mod rate55%
P2% co-occurrence
GPL Ghostscript
Appearances35
Mod rate43%

Long tail

Notable observations

Smaller cuts of the PScript5 corpus — useful context, but treat each row as a single data point rather than a strong signal.

Pages parsed
1,166
Oldest observed
4 May 2020 — about 6 years ago

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