PDF malware analysis — malicious · 9024011701ab6f6b

MALICIOUS

PDF

5.3 KB Authoring application: stb

MD5: c1fd6dfe47907d747c5f47f4b41be5e9 SHA-1: 92d8384d0bcee91b54cec3ed68e27a7e00d0c5fc SHA-256: 9024011701ab6f6b285e09aad2f5e2ff0e705cb2399f326348e87998339bc060

70 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged as malicious by an ML classifier with high confidence. Static analysis detected an embedded script payload within a PDF stream, identified as a JavaScript file. This JavaScript is likely intended to download and execute a second-stage payload. The presence of embedded files and scripts strongly suggests an attack pattern aimed at delivering malware.

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_off000002e7.js` `9bfcd30d4e7b7df92639e06d697faf323ff94192e26072695fcc5c8e5ae8c5d6`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2E7	73945 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 long base64-like blob(s).

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