PDF malware analysis — malicious · 8a0ac97c0f30a955

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: 82c42f6d6d7991fdb829e39cba2eb31f SHA-1: 22aaddda38a2a464bdc3875d2bdd990f228edcd9 SHA-256: 8a0ac97c0f30a9552ca379cf3814e253f5222abc90df911bd25e6730915b8b18

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. The presence of a PDF_EVAL heuristic firing suggests the use of eval(), which is often employed to execute obfuscated code. The extracted artifact 'javascript_obj0013_001.js' further supports the presence of script content. The obfuscation and use of eval() strongly suggest the script is designed to download and execute a second-stage payload.

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` `623786b0ae9923b7d3bddf633ec3709fddeb01c9ee01125dc80a62d3076bd668`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D2	12514 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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