PDF malware analysis — malicious · 67c986e3080bdb67

MALICIOUS

PDF

19.4 KB

MD5: 71e6f2f301110240e0d0ce1e69704de5 SHA-1: 515f60d40764e340f878dc99bfdb20e11c396b13 SHA-256: 67c986e3080bdb6767ada5c88f5fb2b7aecd25e620322376325d97162ccd9fc5

108 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The sample is a PDF file flagged as malicious by ClamAV and an ML classifier. It contains embedded JavaScript streams that are obfuscated but appear to be designed to download and execute a second-stage payload. The presence of JavaScript actions and embedded JS streams strongly suggests exploitation for client execution via a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

ClamAV: Pdf.Dropper.Agent-1828773 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-1828773
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_obj0008_000.js` `be394a24c3294d44c44527db51d998f24b42086cf4b9b6a261abe7edbb65417a`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	19115 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`javascript_obj0008_001.js` `b54d595b91b773a6730ca99d9813444c3b0ab62e069efcfedf307f2402f18dab`	pdf-javascript-stream	PDF /JS object 8 at offset 0x20A	19365 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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