PDF malware analysis — malicious · 6843a889207d278e

MALICIOUS

PDF

1.5 KB

MD5: fdb440a23b67143b0b6e064cec6c75ef SHA-1: 658d7ea7143977b99df709461ec6af02b2954d31 SHA-256: 6843a889207d278e75a1f063b19955925e57d9ed8f115eb638ab5d87d3aa152c

208 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

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-19733 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-19733
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111111_000.js` `4bf3a4991eeab104f5e302d2b88205e7a9531532e156366ac9c8b949eefeccb4`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	2220 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`javascript_obj111112_001.js` `bc544124e3a2619172183d186334b5e4af6e65dff70667d495347b23ee2beda9`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x546	66 bytes

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