PDF malware analysis — malicious · 83f893b80c896a0e

MALICIOUS

PDF

2.9 KB Created: 2008-08-06 01:42:27 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 5accce571e2f504dc3ed1070d64c48f0 SHA-1: 04879308bdd8094a73cc23fd31e6270ef400dc37 SHA-256: 83f893b80c896a0e77a2be90e42035ba559f10db4fe2f70cdd379ace43257e83

98 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF document contains embedded JavaScript, which is obfuscated using eval() and unescape() calls. This script is likely designed to download and execute a second-stage payload. The presence of these obfuscation techniques and the execution of JavaScript within a PDF strongly suggest malicious intent, although the specific family could not 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_obj0013_001.js` `2522ad2f1c8f0cb913188c10347a26a341901d639e31a5a41cea44b405ca2081`	pdf-javascript-stream	PDF /JS object 13 at offset 0x36C	3227 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s).

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