PDF malware analysis — malicious · d329b918bd01285d

MALICIOUS

PDF

4.2 KB

MD5: b97687db2438d5cb8ac2d80ffc90ce45 SHA-1: d4194a7726099aaf314dc706f1c0d842b60ba8b0 SHA-256: d329b918bd01285dd8d8a519ce80d287c369b1fc43d48794738cf7a614791cd5

100 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF sample contains embedded JavaScript, indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic and the presence of an extracted JavaScript file. The PDF_EVAL heuristic suggests the script is executed using an eval() call, a common technique for obfuscation and payload delivery. The ML classifier strongly flags this PDF as malicious. The embedded script is likely responsible for downloading and executing a secondary payload, contributing to the overall malicious nature of the document.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 4

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD

PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
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
`stream_000_off00000287.js` `83003f89bb8a75f42df30006959f30954ffe7236f9c0941759c08c454197bb0e`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x287	10488 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).

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