PDF malware analysis — malicious · 9ff240bef3170639

MALICIOUS

PDF

35.5 KB Created: 2009-05-01 21:21:45 Authoring application: tvEeSFCPx (via NeTSnrx)

MD5: 4462600055bf0363b84bf56a3a66b1b1 SHA-1: 0596ce8649c43474d13e30a50ee930c5ba754219 SHA-256: 9ff240bef3170639a36ceb056769e88a76b8548d38b1821dbc96bf8c87518f40

98 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell T1027 Obfuscated Files or Information

The PDF file contains embedded JavaScript streams, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of PDF_EVAL and PDF_UNESCAPE calls suggests that the JavaScript is obfuscated and designed to execute arbitrary code. The extracted JavaScript files, javascript_obj0007_000.js and javascript_obj0007_001.js, are likely responsible for downloading and executing a second-stage payload. Due to the obfuscation, the exact nature of the payload and its final destination could not be determined.

Heuristics 5

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `78c77e71f8caf935c6e5fd8ff26f9e602d1171f1906b99a9658594fe69812e2f`	pdf-javascript-stream	PDF /JS object 7 at offset 0x215	35126 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0007_001.js` `5c24b4c84665e63a42e967344d2da100a78c7e30dd26108c749f4b7e9f07102d`	pdf-javascript-stream	PDF /JS object 7 at offset 0x215	35039 bytes

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