PDF malware analysis — malicious · 987febb5069e598a

MALICIOUS

PDF

3.5 KB Created: 2009-02-21 10:06:41 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 647da8d2ee1213926331077babafb8e4 SHA-1: abc5400cc2751e68ebc8b8ef0b201a314f175d8e SHA-256: 987febb5069e598acf6ee2d71de0a8efab80d82e99340cbdcc90ff8ea39f5e36

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains obfuscated JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT', 'PDF_JS', 'PDF_EVAL', and 'PDF_FROMCHARCODE'. The 'PDF_EVAL' and 'PDF_FROMCHARCODE' heuristics suggest the script is attempting to dynamically construct and execute code. The presence of 'deobfuscated.js' further supports this. The script's intent is likely to download and execute a second-stage payload, although the exact mechanism is obscured. Due to the obfuscation, confidence in the exact family is reduced.

Heuristics 5

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_000.js` `38bbab9e9db1f1ec4d97ecf0aa46ed7a494558064656e1e00cc6a2c4ad53517b`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3CE	7141 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`deobfuscated.js` `863bbd4d7b514e3dc6324182661df7302ba044ab1b5f529ad7e7d09f857d650e`	deobfuscated-js	PDF JavaScript deobfuscation pass	15802 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s).

Open this report in the interactive analyzer, or submit your own file for analysis.