PDF malware analysis — malicious · f202d9fc95493839

MALICIOUS

PDF

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

MD5: 41547f9bc91a7b8671e5a2f245affdbc SHA-1: 3a425907431a5f72ae792262bcb5941f53b7bdb0 SHA-256: f202d9fc95493839dae0bf373416fdce1288528f00bad09c5c32c86c00b54c46

98 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 Scripting: JavaScript

The PDF file contains embedded JavaScript streams that are heavily obfuscated using eval() and unescape() calls. The heuristics indicate suspicious JavaScript activity and the presence of eval() and unescape() functions, which are commonly used to hide malicious 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 ultimate destination could not be determined with high confidence.

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` `c79d412c7f2cf56224fb553d7754b0db502b7040e097a3c4e86656818b7b037d`	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` `a0c93f489d0fc386f5ac26c497284b2b30fc16ab57c0391091a0f2e7efc38128`	pdf-javascript-stream	PDF /JS object 7 at offset 0x215	35039 bytes

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