PDF malware analysis — malicious · e86eb33ae1dbf31a

MALICIOUS

PDF

5.3 KB

MD5: 9e871b15991c593e5f98d9174586bdde SHA-1: 53bbadd129e267be66823d257287dde4dc98e0a7 SHA-256: e86eb33ae1dbf31abf54ef9710a07bfca4bbf8270cdabe018a3e584b4b41da53

60 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged by a machine learning classifier as malicious and contains an embedded JavaScript payload. The heuristic 'PDF_EMBEDDED_SCRIPT_PAYLOAD' confirms the presence of a script within a PDF stream. The extracted JavaScript file, 'stream_000_off0000035e.js', is likely responsible for downloading and executing a second-stage payload, which is a common technique for initial access and further infection.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

Heuristics 3

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_off0000035e.js` `3e976fc465d08dcbf74fa5a442c2fcfeb0e2b1db830d6c9cb3acd31270e92329`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x35E	26251 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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