PDF malware analysis — malicious · da08502b359ac598

MALICIOUS

PDF

5.3 KB Authoring application: saerb

MD5: 97a168c9135b18b0878435bca7e32c1e SHA-1: 0bbb3e1c944acf4b6efb038f8e154a95b49d3138 SHA-256: da08502b359ac59857ff25cf62963bd71294bcf1124c32504f08d810f67b9bc4

70 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The PDF file was flagged as malicious by an ML classifier with high confidence. Heuristics indicate the presence of an embedded script payload within a PDF stream, specifically a JavaScript file named 'stream_001_off000002e9.js'. This embedded script is likely intended to execute malicious code or download a second-stage payload, contributing to the overall malicious nature of the document.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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_001_off000002e9.js` `b048ee7e6a9016adfcc4e156121cb1db4e12682f305d74bd9fe28ba7ca6f6817`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2E9	65176 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 long base64-like blob(s).

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