PDF malware analysis — malicious · 12dce89d2d84ac5d

MALICIOUS

PDF

15.9 KB

MD5: 77efe47fa06e74132f639df392bc4ad3 SHA-1: fc9c29ae2610389590e1e222ab1105a5ca39f15d SHA-256: 12dce89d2d84ac5daa42d6ea1a16ae7514de87b669c49b535cfa383605f55819

108 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript, identified by multiple heuristics and flagged as malicious by ML and ClamAV. The JavaScript code appears to be obfuscated and attempts to download and execute a second-stage payload. The primary IOC is the embedded JavaScript file itself.

Machine Learning

Nyx PDF Classifier malicious score 0.9924

Heuristics 4

ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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_obj0006_000.js` `c423484fe6edbe89a2114bab78d4abe32a99e8768b95dbd985fff82ed43af83b`	pdf-javascript-stream	PDF /JS object 6 at offset 0x19C	17113 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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