PDF malware analysis — malicious · 32f1139d0888588a

MALICIOUS

PDF

4.0 KB

MD5: aad4f39be14b6655ca071b707c166ea4 SHA-1: 9ca918f020d29d451b6549e06ae8c9128cb77a5c SHA-256: 32f1139d0888588ae6b527a576f6461cde144f95a096d737ee6a9c77a98206ba

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The presence of eval() and String.fromCharCode() suggests the script is obfuscated and likely designed to download and execute a second-stage payload. The extracted JavaScript files, though not fully detailed here, are the primary mechanism for the malicious activity.

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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111611_000.js` `529ab92155d377ef41b1037183ebf620733439b2c960e4ba538e9eabfca8559b`	pdf-javascript-stream	PDF /JS object 111611 at offset 0x197	256 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj111612_001.js` `630e27e3d640ec233d99a4d2f6ed42201d9a093ce0d1f4570029bd2fd8063b14`	pdf-javascript-stream	PDF /JS object 111612 at offset 0x266	5546 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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