PDF malware analysis — malicious · c0dbe0b344227f4c

MALICIOUS

PDF

10.3 KB

MD5: 2470f1a764615a183f8e530c959ca3c9 SHA-1: b799f58af98d867c5544842875a0c8f0bbaf62c7 SHA-256: c0dbe0b344227f4cc3f8979a6fbf1358aca942ed91002c139417ee6bf6450518

90 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The 'PDF_UNESCAPE' heuristic suggests the JavaScript is obfuscated. The ML classifier strongly flags this PDF as malicious. The embedded JavaScript file 'javascript_obj0007_000.js' is the primary artifact, likely responsible for delivering a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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_obj0007_000.js` `f30ecdf2774f5667a4deaafe727f90db3327bf0bcb50b09142aaaa2b683024b0`	pdf-javascript-stream	PDF /JS object 7 at offset 0x233	46322 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 223 eval/decoder/string-building token(s).

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