PDF malware analysis — malicious · 7e491b9857b59f3f

MALICIOUS

PDF

7.1 KB Created: 2009-12-17 16:59:10 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12) First seen: 2026-05-11

MD5: a27db956f8695e9067155e1a47484460 SHA-1: 9aec23cc515d1aacfb6528a3f544597175da1640 SHA-256: 7e491b9857b59f3f8548ea4eb217914bf1af76bec934234a247d18cca1e27ad2

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains embedded JavaScript that utilizes the unescape function and performs a heap spray. This behavior is indicative of an exploit attempting to gain control of the execution flow, likely to download and execute a secondary payload. The ML classifier strongly flags this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 4

JavaScript action low 2 related findings PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
Matched line in script
```
var n = unescape("%u3f42%u3792");
```
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0021_000.js`	pdf-javascript-stream	PDF /JS object 21 at offset 0x1883	139 bytes
SHA-256: `3c70c39f55ca9c8b96b2c932ee8dbc870c245586a58ea450ed5a9453b69d856c`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
Preview script First 1,000 lines of the extracted script var n = unescape("%u3f42%u3792"); var xxx = 0x8000; while(n.length <= xxx) n += n; n = n.substring(0, 0x8000 - asdsadas.length);

Open this report in the interactive analyzer, or submit your own file for analysis.