PDF malware analysis — malicious · 558315ce6e7c4f4e

MALICIOUS

PDF

4.1 KB

MD5: b5d5f52c94c9241eed5c9afcf841a774 SHA-1: 49707920d234ae2276b1f2853485f4b7b1a21e79 SHA-256: 558315ce6e7c4f4eaf8b7e3b72dd1087ef61ab53db518de9de3f676fee17da19

66 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by a machine learning classifier as malicious with a high confidence score. Heuristics indicate the presence of an embedded script payload and an embedded file, suggesting it's designed to deliver and execute a secondary malicious component. The embedded file 'embedded_file_obj0008.bin' is the primary indicator of compromise.

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` `454efe0b0eeb11f4f3664444fb1df24e4fc02a92cf8550fef9d70709f6a770e8`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xEA	12873 bytes

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