PDF malware analysis — malicious · 494b6dd5197cf492

MALICIOUS

PDF

6.4 KB Created: 2009-10-25 20:35:22 Authoring application: Scribus 1.3.5svn (via Scribus PDF Library 1.3.5svn)

MD5: 65f53380a2650904e6cdaeed432ad642 SHA-1: d795fd395ac7b671107bcf0fb9cfd13ca0ea39db SHA-256: 494b6dd5197cf492c362c92e7ca5f8df25fd2a805a7bbbf80bba3e6fc5735ca8

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The PDF_UNESCAPE and PDF_FROMCHARCODE heuristics suggest that the JavaScript is obfuscated, likely to hide its malicious intent. The extracted artifact 'javascript_obj0013_001.js' is also flagged as suspicious due to script obfuscation. The primary function of the script appears to be downloading and executing a second-stage payload, though the exact details are obscured.

Heuristics 5

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.
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `714ad42b67aa475a019a5f1f5db08f6c39082c8b390ba644e6fe619f47733230`	pdf-javascript-stream	PDF /JS object 13 at offset 0xC11	11101 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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