PDF malware analysis — malicious · bc82aa586feb6e87

MALICIOUS

PDF

26.3 KB Created: 2011-06-10 16:38:00 +03:00 Authoring application: Wiki Student Loans Arkansas (via mPDF 5.0)

MD5: 5ee0085e5278e034b48223efb373d58e SHA-1: 4dbdefb5b3a7a03a08a21f1ec092f0cdfc6fca68 SHA-256: bc82aa586feb6e876a1a6c39018a1c888f62cbdaadcfc002adfacb222f006a0a

76 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript streams, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. The presence of unescape() calls and obfuscation indicators suggests the script is designed to be malicious. The extracted JavaScript files, javascript_obj0020_000.js and javascript_obj0020_001.js, are likely responsible for executing the malicious payload. The obfuscated nature of the document body and scripts prevents a more detailed analysis of the script's specific actions.

Heuristics 4

unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
Suspicious extracted artifact medium 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.
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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0020_000.js` `357d06d70777f397a54fd04180a5ee36f36a8ec5c7cbbafdfab41f20901b25ac`	pdf-javascript-stream	PDF /JS object 20 at offset 0x61D8	136 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long hex-escaped blob(s).
`javascript_obj0020_001.js` `607a0753f2d28ea7a383d2e729ee9a1eeb69db22eafb74fa3e1d444ae047c123`	pdf-javascript-stream	PDF /JS object 20 at offset 0x61D8	134 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long hex-escaped blob(s).

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