PDF malware analysis — malicious · ecb3c90bb6dc0795

MALICIOUS

PDF

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

MD5: 606f91bee3d39bdd852c4d1440792dc8 SHA-1: a4def4d6b59741194fca0dd440da720ab59af205 SHA-256: ecb3c90bb6dc079568b9274fcbe8a3c4029d8fbc17567a42fd56f6fc23f718d3

98 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript that utilizes eval() and unescape() functions, indicating obfuscation and potential malicious code execution. The presence of PDF_JAVASCRIPT and PDF_JS heuristics further supports this. The extracted artifact javascript_obj0021_000.js is likely the payload. The exact intent of the script is unclear due to obfuscation, but it is highly suspicious.

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` `2e0687b0780919340189252ca5b63b424a87f3c2f1a0c3567b126cb7ea31ce1a`	pdf-javascript-stream	PDF /JS object 21 at offset 0x1883	445 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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