PDF malware analysis — malicious · c7e216d99a61e1ce

MALICIOUS

PDF

10.8 KB

MD5: 1de67ad500e11c57d49b59998d011cc3 SHA-1: 7bcd39841cda23a7795d4aa55062a464f5e293f4 SHA-256: c7e216d99a61e1cef53f3369328ad77f9dda9698fe03a0839440f5c4b8caebe4

90 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The ML classifier strongly flags this PDF as malicious. The JavaScript stream, identified as 'javascript_obj0007_000.js', likely contains obfuscated code designed to download and execute a second-stage payload, as suggested by the PDF_UNESCAPE firing. The exact nature of the payload cannot be determined without further analysis of the script's deobfuscated content.

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 1 related finding 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` `1636ad2dc079808336fe88ddd04006b6bbb4ccde56f508ee2f2a5dedbde3b9f4`	pdf-javascript-stream	PDF /JS object 7 at offset 0x233	47425 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 258 eval/decoder/string-building token(s).

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