PDF malware analysis — malicious · fb5cdf57e5f0f047

MALICIOUS

PDF

4.2 KB

MD5: 9a839a0520312d79a552fb9a5c0e280b SHA-1: 0bbdef6d5323038a0e612a4ff08da4b58aab50db SHA-256: fb5cdf57e5f0f047a2f58facf70e62ed52ecf7937cc685ecc87af9283c228e48

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file was flagged by a machine learning classifier as malicious with a high degree of confidence. Static analysis revealed an embedded script payload within a PDF stream, indicating an attempt to deliver and execute malicious code. The presence of XFA forms and embedded files further supports a malicious intent, likely for exploitation or further payload delivery.

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` `1844123a8fcd55f7ff34c69c2c1228eb67bf66864b675d7bdbeea1010841df94`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xEA	12951 bytes

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