PDF malware analysis — malicious · e50115869317a2b5

MALICIOUS

PDF

184.0 KB

MD5: e36da9e1039215b2a4cf3cf73790eff4 SHA-1: 9c8cd13c1abc99f848a0d74ede0812527223b742 SHA-256: e50115869317a2b52a2de56b8f7265f701c73c99ed40c37d37c01228d698d8df

78 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 stream, identified as 'javascript_obj0008_000.js', is likely responsible for executing the malicious payload. The presence of PDF-specific heuristics like ASCIIHexDecode with exploit indicators further supports the malicious nature of the document.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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_obj0008_000.js` `250c6c461583d0b6eacf3cfca4172b9b75004829dbf66b28a2d48b9f169ef6db`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	62535 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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