PDF malware analysis — malicious · 3040970fc5ca5936

MALICIOUS

PDF

2.3 KB

MD5: f216178f78c964a043378f612c6fbbd2 SHA-1: b043671bf557b82320aa09976924485de7153933 SHA-256: 3040970fc5ca59366b6d0237cf1a25a2d0d4875b75550bf70d624841a50c38bb

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged as malicious by an ML classifier and contains embedded JavaScript. The JavaScript utilizes an unescape function, indicating obfuscation and a likely attempt to exploit PDF vulnerabilities. The presence of JavaScript actions and embedded JS streams strongly suggests the document is designed to execute malicious code upon opening. No specific family could be identified, but the techniques used are common for PDF-based malware delivery.

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
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_obj0005_000.js` `0ebbd9e332546f82cac649a2ea02dcc689c44a58959d59d6f4b0cfc7f4538b14`	pdf-javascript-stream	PDF /JS object 5 at offset 0xEA	1935 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).

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