PDF malware analysis — malicious · 4d3a44b8a08386f1

MALICIOUS

PDF

7.4 KB Created: 2012-08-04 17:40:47

MD5: e1be283cad4fbd726f7b582dd080893b SHA-1: db3883c49eecf8bf3a1999503ff6cae43699d530 SHA-256: 4d3a44b8a08386f1238c3c00b9cb2b2c6805daeaa8f9ef6fe720eddfa65b4be3

70 Risk Score

Malware Insights

MITRE ATT&CK

T1553.005 Mark-of-the-Web Bypass T1204.002 Malicious File

The PDF contains an embedded file, identified as a suspicious artifact by static triage. The ML classifier strongly indicates maliciousness. The embedded file, 'embedded_file_obj0011.bin', is likely the malicious payload. No scripts were extracted, and the document body was truncated and unreadable.

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
`embedded_file_obj0011.bin` `493f32e35d53c80556223cc410621a81b348010893e4fa673d3059fb43d3fa89`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0xB97	6910 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 long base64-like blob(s).

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