PDF malware analysis — malicious · 312a43ba7de013d0

MALICIOUS

PDF

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

MD5: 72ceb54ee22165213f9a86ce47046eb0 SHA-1: e71063fa5df027aab5190f028be3664ef69d2395 SHA-256: 312a43ba7de013d0483905bd6282905434946dfa572765124e1b5a00926b721d

98 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript streams which are heavily obfuscated using eval() and unescape() calls. These obfuscation techniques are commonly used to hide malicious code execution. The primary intent appears to be the execution of arbitrary code, likely to download and run a secondary payload. Due to the heavy obfuscation, the exact nature of the payload and its ultimate destination cannot be confidently 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` `5c55dd4ae7ff585fd0cb7d9caee9ad3217bfad157139568a00fc4af147c3f372`	pdf-javascript-stream	PDF /JS object 7 at offset 0x215	35626 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0007_001.js` `95f3a1b57c3c484b0cc28f43ed0a1f8a59b42b3d58d85e24701ea03357f6f2d8`	pdf-javascript-stream	PDF /JS object 7 at offset 0x215	35539 bytes

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