PDF malware analysis — malicious · ded2a3e2d5b85780

MALICIOUS

PDF

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

MD5: 21f62257c264cfd5873cb972330eb87f SHA-1: df5d4f03ef6bc462100a323e815b709bee6274c6 SHA-256: ded2a3e2d5b85780189e3e9f30228e1f52128f5e7b491ee906be7085cebcff4b

98 Risk Score

Malware Insights

MITRE ATT&CK

T1027 Obfuscated Files or Information

This PDF file contains embedded JavaScript streams that utilize `eval()` and `unescape()` functions, indicating obfuscation and dynamic code execution. The heuristics suggest these scripts are designed to exploit vulnerabilities within the PDF reader. The presence of two large JavaScript files, `javascript_obj0007_000.js` and `javascript_obj0007_001.js`, strongly implies an attempt to download and execute a secondary payload. The confidence is moderate due to the lack of specific IOCs like URLs or hashes within the provided evidence, and the obfuscated nature of the scripts.

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` `7748a65f03438cd02c2f0fd2ad93d05e39f2fe5205e0491f5f28d08cda28996c`	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` `49b024542e1cc2fa56cbfcd8fd16a72085bf5d00ba434a4a77bd428608cc3255`	pdf-javascript-stream	PDF /JS object 7 at offset 0x215	35039 bytes

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