PDF malware analysis — malicious · 34e9c9a35b81dfeb

MALICIOUS

PDF

11.1 KB

MD5: 1aa0235b836806531bcc1d0ee0b2cbad SHA-1: df95a8fb0fa0e5660dcec91e54e23cde57f3bfa6 SHA-256: 34e9c9a35b81dfeb7e1737c864902aa9d80c21ff961e0ab0ad5ac1d00b360e5a

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The ML classifier strongly flags this PDF as malicious. The embedded JavaScript stream, named 'javascript_obj0007_000.js', is likely responsible for executing malicious code, potentially downloading further payloads or performing other harmful actions. The 'PDF_UNESCAPE' heuristic suggests obfuscation techniques were used within the JavaScript.

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` `2cfff99ef7368b7001ba2200dc8828867327722cff50bf2acce3564f58c3687e`	pdf-javascript-stream	PDF /JS object 7 at offset 0x233	49250 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 259 eval/decoder/string-building token(s).

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