PDF malware analysis — malicious · 50b54ed5c1fa35cb

MALICIOUS

PDF

7.3 KB Created: 2009-12-17 16:59:10 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 053f2dc99ac45cbcc342ab175d26ca0c SHA-1: 3654fcfee6da6beb26fc5d801eaa19a41590e82f SHA-256: 50b54ed5c1fa35cb216269d856d3288b5ec3806854b812c66a347dfe3317dfa3

98 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript that utilizes eval() and unescape() functions, indicating an attempt to obfuscate and execute malicious code. This script is likely responsible for downloading and executing a secondary payload. The presence of these functions and the PDF JavaScript action heuristic strongly suggest a malicious intent, although the specific family cannot be determined.

Heuristics 5

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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.
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_obj0021_000.js` `d81f4f4aaef7bc30bbcae89bf468ee02e85f90a01a5d8d82eaa10b70a9897b12`	pdf-javascript-stream	PDF /JS object 21 at offset 0x1883	608 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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