PDF malware analysis — malicious · b0446949042ab0c6

MALICIOUS

PDF

4.9 KB Created: 2011-04-05 23:46:28 Authoring application: bufdb lsdfob

MD5: b1822579807502a6ec78e0773327f243 SHA-1: 0652e1c3de22e6b5a5336e4240f14df61c39d937 SHA-256: b0446949042ab0c69aea2ee4ae8722b9ff9568cd88852a862ba5dbf044e9e8dc

68 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution: Malicious File T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains an embedded JavaScript payload, indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic and the presence of the stream_001_off0000031f.js file. The ML classifier strongly flags this PDF as malicious. The embedded script is likely intended to download and execute a second-stage payload, contributing to the overall malicious nature of the document.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_001_off0000031f.js` `edb57e4c5d40bab2931443701a29f4c11fd314c5aee8c0306c8eca1c313440e6`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x31F	13273 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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