PDF malware analysis — malicious · 6e516d5ea3016c3f

MALICIOUS

PDF

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

MD5: cc07a5ce173c46fe4128724ca22f21a5 SHA-1: bba43ef42826a51b7b2d36f7dee164002153f42b SHA-256: 6e516d5ea3016c3f66bf37ce1b811982f046937eb840f098fc959457a55fd6ce

248 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains embedded JavaScript that utilizes eval() and unescape() functions, indicative of exploit code. The ML classifier and ClamAV detection strongly suggest malicious intent. The JavaScript is heavily obfuscated, but the presence of exploit-related functions and the overall heuristic firings point to a common PDF exploit pattern designed to execute arbitrary code, likely for downloading further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 7

PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
ClamAV: Pdf.Exploit.Agent-13745 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-13745
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` `f670d6a46948a5a4a57f827f6146ceaf4d7bce1e246499db4a7918196efd0088`	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` `7eea93fb184f0826faaef62efabf70577dfb23515be5d7547295ed762bff53a8`	pdf-javascript-stream	PDF /JS object 7 at offset 0x215	35039 bytes

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