PDF malware analysis — malicious · 56d10a5d9ead7149

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: 121d7dbcc96ee847207e0c18e8ee0f4c SHA-1: acf683bb08c4f595fd24e4971c7cbf71cb10212a SHA-256: 56d10a5d9ead7149670d7ded1f67730cb00cabc34e0ec3591b5d98e107e266b9

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 'PDF_EVAL' and 'PDF_FROMCHARCODE' rules suggest the script is obfuscated and uses dynamic code execution. The presence of 'Script obfuscation indicators' in the static triage further supports this. The primary function of the embedded JavaScript appears to be the execution of arbitrary code, likely to download and run a secondary payload. Due to the obfuscation, the exact nature of the payload and its destination could not be determined.

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` `56fd1d37fc7e4c052cdac867718a8f6e38b9327abf2704aa0bd1b564ded1650a`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D2	12660 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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