PDF malware analysis — malicious · 50a1f45f6fa936c9

MALICIOUS

PDF

4.1 KB Created: 2008-31-20 53:85:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 43be2e950007de829af251c8ca4c9a0f SHA-1: 2acd8a4bccd98915bcb333f2f0ceec71c06169d6 SHA-256: 50a1f45f6fa936c90285f3a08d2559e9365c0a49228dbe5f01b92d7a1ede6f03

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

This PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The JavaScript stream is obfuscated and utilizes eval() and String.fromCharCode, suggesting an attempt to hide its malicious functionality. The primary purpose appears to be the execution of arbitrary code, likely to download and run a secondary payload. The file was authored using Scribus, which is not inherently suspicious, but the embedded, obfuscated script is a strong indicator of malicious intent.

Heuristics 5

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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_obj0013_001.js` `d3c00ba34f4d15163ce60d5a625c117e8ce1742abd084f5c38c4d8f374449685`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D2	12513 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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