PDF malware analysis — malicious · cdebbeb022642770

MALICIOUS

PDF

4.1 KB

MD5: c04b4e4c7372291125c565dc40d80ab9 SHA-1: 5865dac81d8681ece24c807443a75b4070dcad7c SHA-256: cdebbeb0226427704233cbbd9af9eeddcafdabadeb46652e1b73466a8724271a

66 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF contains embedded script content, flagged by a high-severity heuristic, and was further identified as malicious by an ML classifier with a score of 0.999972. The presence of an embedded file object suggests it is intended to download and execute a secondary payload. The specific nature of the embedded script could not be fully determined due to its obfuscated nature.

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` `6a11d19b3106a0feb642f8970fe65c78251b8eb9324cf34eb93cda8bf6aba46c`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xEA	12861 bytes

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