PDF malware analysis — malicious · b9b9b1a6038fb434

MALICIOUS

PDF

1.9 KB Authoring application: fvck

MD5: d000e74163e34fc65914676674776284 SHA-1: 94358cebc08f6677df9b28e5b893dce71003081a SHA-256: b9b9b1a6038fb434a35c03e41b96197179fe9ed82dabdb58c8af3167c6561533

148 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The file is a PDF containing embedded JavaScript, flagged by multiple heuristics including ML classification and ClamAV detection as Pdf.Exploit.Agent-30128. The JavaScript stream utilizes an unescape() function, indicating obfuscation. The primary function of the embedded script is to execute arbitrary code, likely to download and run a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Exploit.Agent-30128 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-30128
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `b89671df54fb9e35d8ff9ad1a10c6f643f8ade670fcd79d2f1f78e03c499f69b`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3A6	617 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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