PDF malware analysis — malicious · 4a89040bbf7628bc

MALICIOUS

PDF

4.2 KB

MD5: 9fd48cd74864bc5872077c3e1a0a8202 SHA-1: d46967fc524ef79213e404db2e7d38d16a8652f9 SHA-256: 4a89040bbf7628bcd658ee6116cd0809743d9b09cf3186e85844a3268ca51a5c

66 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF exhibits multiple high-confidence indicators of maliciousness, including an embedded script payload and a high ML classifier score. The presence of an embedded file further suggests a delivery mechanism for a secondary payload. While no specific family is identified, the techniques point towards a common PDF-based malware delivery strategy.

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` `4918de5b2c599277af1da679fc36966998077e1c75b02bafc863f4cda2d26b64`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xEA	12892 bytes

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