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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

Adobe Acrobat

Adobe Acrobat reads as a downstream re-saver — it surfaces disproportionately on documents whose original Creator was a different, often institutional, application.

Back to all statistics
Forensic verdict

Anomaly profile

Based on 318 appearances across the HTPBE? corpus.

Modification rate
53%+5pp above baseline
Corpus baseline: 48%
Total appearances
318
1.5% of corpus
Modification rate
53%
+5pp above baseline
Role split
52%C/48%P
Creator vs Producer share of appearances

Corpus profile

How Adobe Acrobat shows up in HTPBE? corpus

Adobe Acrobat is the canonical PDF editor. Its presence as the latest Producer indicates the document was opened and saved by Acrobat at least once after creation.

Acrobat as Producer is extremely common and legitimate on its own. Contextual signal arises only when Acrobat’s save coincides with incremental-update evidence (xref appended), modifications-after-signing markers, or producer/creator mismatch — all of which are layered on independently.

The signal
Acrobat as Producer is extremely common and legitimate on its own.

Role in the workflow

How Adobe Acrobat 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 · 52%
As Producer · 48%P
CAs Creator
  • Usage
    166
  • Modification rate
    50%
  • Avg file size
    1.0 MB
PAs Producer
  • Usage
    152
  • Modification rate
    56%
  • Avg file size
    1.1 MB

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.

Name fingerprints

Also goes by

Different version strings and spellings observed for Adobe Acrobat in the wild. All are merged into the same canonical profile.

Adobe Acrobat Pro DC (64-bit) 22.1.2008540.9%
Adobe Acrobat 22.120.8%
Adobe Acrobat 22.1 Image Conversion Plug-in20.8%
Adobe Acrobat4.7%
Adobe Acrobat Pro DC 20.9.200632.5%
Adobe Acrobat (32-bit) 25.1.212231.3%
Adobe Acrobat Pro 11.0.0 Paper Capture Plug-in1.3%
Adobe Acrobat 26.10.9%
Adobe Acrobat 26.1 Image Conversion Plug-in0.9%
Adobe Acrobat (64-bit) 26.1.215630.6%
Adobe Acrobat 13.00.6%
Adobe Acrobat (64-bit) 25.1.205770.6%
Adobe Acrobat Reader (iOS)0.3%
Adobe Acrobat 19.80.3%
Adobe Acrobat 24.40.3%
Adobe Acrobat 25.1.211840.3%
Adobe Acrobat 25.10.3%
Adobe Acrobat 24.50.3%
Adobe Acrobat 23.30.3%
Adobe Acrobat 25.1 Image Conversion Plug-in0.3%
Adobe Acrobat 24.4 Image Conversion Plug-in0.3%
Adobe Acrobat Pro 10.1.160.3%
Adobe Acrobat 19.8 Image Conversion Plug-in0.3%
Adobe Acrobat 23.3 Image Conversion Plug-in0.3%
Adobe Acrobat 24.5 Image Conversion Plug-in0.3%

Why variants matter

The same tool publishes itself under 25 different metadata strings — version bumps, locale tags, build IDs. We canonicalize them so the corpus reflects one identity, not noise.

Most common
Adobe Acrobat Pro DC (64-bit) 22.1.20085
40.9% of appearances
Variant spread
25 distinct strings
Long-tail share: 59.1%
Observed range
17 Jul 2023 → 21 May 2026

Distributions

What ships alongside Adobe Acrobat

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

PDF versions written

Most output is PDF 1.6 (100% of files where Adobe Acrobat is the Producer).

PDF 1.6100.0%

Common Producers when Adobe Acrobat is the Creator

Adobe PDF Library writes 9% of these files — that pairing is the Adobe-stack default for many institutional pipelines.

Adobe PDF Library9.0%
macOS Print to PDF2.4%

Common Creators when Adobe Acrobat is the Producer

Adobe Acrobat sits upstream in 97% of cases — read this row as “what kinds of documents end up routed through Adobe Acrobat.”

Adobe Acrobat96.7%
Scanner Fujitsu2.6%
VersaLink B4050.7%

Related profiles

Tools you’ll see next to Adobe Acrobat

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

P5% co-occurrence
Adobe PDF Library
Appearances337
Mod rate73%
P1% co-occurrence
macOS Print to PDF
Appearances747
Mod rate64%
C1% co-occurrence
Scanner Fujitsu
Appearances18
Mod rate33%
C0% co-occurrence
VersaLink B405
Appearances1
Mod rate100%

Long tail

Notable observations

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

Pages parsed
328
Oldest observed
17 Jul 2023 — almost 3 years ago

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