PDF malware analysis — malicious · 55a3fe744e05832b

MALICIOUS

PDF

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

MD5: 83db54873508fafd6477ec4b978eb140 SHA-1: 2eded6c9be7fbb97ec4dc18d3d94da093075d18d SHA-256: 55a3fe744e05832bda010d480df46649e3aabddec987fcf9259489feeb5e0290

98 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 eval() and unescape() calls within the JavaScript stream (PDF_EVAL, PDF_UNESCAPE) suggests obfuscation and dynamic code execution. This JavaScript is likely responsible for downloading and executing a second-stage payload. The file type and the nature of the heuristics point towards a malicious PDF designed for exploitation.

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` `1ee7ddd3b5a1710f44f06131d70be9ce528fd82b59a37607ca70a5ce78b4a4a5`	pdf-javascript-stream	PDF /JS object 21 at offset 0x1883	4870 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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