PDF malware analysis — malicious · eb303cee35f2bb93

MALICIOUS

PDF

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

MD5: 23c02688164f132fed3d58a03cb4cdc9 SHA-1: 7964c3748c1eff40609a77116124f813ecfe881d SHA-256: eb303cee35f2bb935af9c102c45093a088f9a8039df80f57a0d9f07dc1c8d2a9

190 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript T1204.002 Malicious File

This PDF file was flagged as malicious by ClamAV and a machine learning classifier. It contains embedded JavaScript streams that utilize `eval()` and `unescape()` functions, indicating obfuscation and likely malicious intent. The primary function of the script appears to be downloading and executing a second-stage payload, as suggested by the heuristic firings and the nature of the embedded JavaScript. The specific exploit used is not detailed, but the presence of JavaScript actions and streams points to a common PDF exploitation vector.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

ClamAV: Pdf.Exploit.Agent-11505 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-11505
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` `d68722ea6fcad0bed046c8b5858362c5890dbc067bde214bebdc4092376ba45e`	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` `501f040449e88259b38c0010760d12a2bdc013326d2011ce3e72d4962f60a263`	pdf-javascript-stream	PDF /JS object 7 at offset 0x215	35039 bytes

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