PDF malware analysis — malicious · 3f65947deb34b225

MALICIOUS

PDF

4.2 KB

MD5: aab40e666b8f3101d5f5e0e7f9c32dc9 SHA-1: 3a5c8090dc639d7de64173aa59650c304cf40638 SHA-256: 3f65947deb34b22542964241185a666afd4a1006fdf149beabd636eeea12e680

66 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF exhibits multiple indicators of malicious intent, including embedded files and scripts, as flagged by heuristic rules. The ML classifier strongly supports a malicious verdict. While the specific payload or exploit is not detailed, the presence of an embedded file suggests a delivery mechanism for further malicious activity. The XFA form and embedded script are common techniques used in PDF-based attacks.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

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

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0008.bin` `16b05ddd5311dfa39b89f6363c94e62dce8fe7dfd0135d8f5a76ca5c9ca107d9`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xEA	12838 bytes

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