PDF malware analysis — malicious · a5d47cde6142c0f3

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: 4a1e423e1cf1682fbeffc2d055ced87c SHA-1: bf10e83152e00518d7fdc419500123054757d7ce SHA-256: a5d47cde6142c0f392fd70fbb55332f8c3c10034dea067ce781fe33e51ee90a4

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The PDF_EVAL heuristic firing suggests that the JavaScript code is using eval() to execute obfuscated commands. The presence of 'Script obfuscation indicators' in the static triage further supports this. The extracted artifact 'javascript_obj0013_001.js' is likely the source of this obfuscated JavaScript. The primary function of this script appears to be downloading and executing a second-stage payload, although the exact details are obscured by obfuscation.

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` `3fef88834f7ba3375ad878b4941bb16f48ff6daf5eb6a9b11b32353af4125adf`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D2	12700 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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