PDF malware analysis — malicious · fa64cc878917e4e8

MALICIOUS

PDF

4.1 KB

MD5: a946bd918d16dd5999c8b3cc2b9030d4 SHA-1: 3560b09ad0086708ce878c69aacf9c95b19283e4 SHA-256: fa64cc878917e4e89f6d636c0dfdb1ded869b66b7faa5a0fb0c1704b9e096309

66 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment

The ML classifier strongly indicates this PDF is malicious. Heuristics confirm the presence of an embedded script payload within a PDF stream, suggesting it's designed to exploit vulnerabilities and deliver a secondary payload. The embedded file further supports the malicious intent.

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` `206f5aa468e6faff8c796a0d5cb63af651904ce5bffb5a63dc65f2ac85384d11`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xEA	12489 bytes

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