PDF malware analysis — malicious · fd6e45e19f961079

MALICIOUS

PDF

6.7 KB Created: 2009-11-17 23:22:12 Authoring application: Scribus 1.3.5svn (via Scribus PDF Library 1.3.5svn)

MD5: 0021c94035966a86558e8139f99119d2 SHA-1: 0f4b725392ae8bf8b290fbf8fa00924b2301038a SHA-256: fd6e45e19f961079d15af640562f6e58501580016bf5c6bbe31060198a93f715

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The JavaScript stream, named 'javascript_obj0016_001.js', appears to be obfuscated, as suggested by the 'Script obfuscation indicators' heuristic. The presence of PDF_UNESCAPE and PDF_FROMCHARCODE further points to the JavaScript attempting to decode and execute malicious code. The exact intent of the script is unclear due to obfuscation, but it is likely designed to download and execute a second-stage payload or exploit a vulnerability within the PDF reader.

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_obj0016_001.js` `9243adeb6ba1d8daca18389cbac8f00b69b401648f1ae2637f5ff5fffbc2213a`	pdf-javascript-stream	PDF /JS object 16 at offset 0xC9A	12549 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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