PDF malware analysis — malicious · 354a925eeabfe403

MALICIOUS

PDF

2.5 KB

MD5: cab49e1e6859f59afdf6607fef16fc4b SHA-1: a660b4197da29d2d92b6c4d71a5ab79f6a2a0381 SHA-256: 354a925eeabfe40386c73a3b5c8c7fface56be56e81d0bc8d2a31c0fdf091bb8

108 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious File

This PDF file was flagged as malicious by an ML classifier with high confidence. Static analysis revealed an embedded JavaScript payload within a PDF stream, indicated by the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic. The JavaScript appears to be obfuscated and likely intended to download and execute a second-stage payload. The presence of 'PDF_EVAL' further suggests the execution of arbitrary code.

Machine Learning

Nyx PDF Classifier malicious score 0.9994

Heuristics 6

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://ns.adobe.com/xdp/
- http://www.xfa.org/schema/xfa-template/2.5/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_pdf_script_0000039d.bin` `c4697584de0349a687ac326c6177951208caf033dc5d4dfb62396c214e499de2`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x39D	2540 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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