PDF malware analysis — malicious · 6a3484a743c296d8

MALICIOUS

PDF

13.4 KB

MD5: 276cc256f322bec035f0caf0b1827986 SHA-1: 9c9617b906c45eaeffb954c6b023b028fb7bd891 SHA-256: 6a3484a743c296d8b45ccad84cd2e0ace0a2d7486af52713d096c54896399b48

148 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF contains obfuscated JavaScript streams, identified as a PDF JavaScript exploit cluster. These scripts are designed to download and execute a second-stage payload, indicated by the ML classifier and heuristic firings. The specific URLs or final payloads are not directly extractable due to obfuscation, but the intent is clear.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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.
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
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_obj0019_000.js` `55331c9ee9d27fba2a38cd8919c15e05ab7edfe435e51448b774b3166d3402c5`	pdf-javascript-stream	PDF /JS object 19 at offset 0x7E	13556 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0019_001.js` `6f5be8b85040d860f93cbad3847042f624c4f04906e08967935d45b5cd0124c1`	pdf-javascript-stream	PDF /JS object 19 at offset 0xA2	13606 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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