PDF malware analysis — malicious · 826798ed9fab5a83

MALICIOUS

PDF

12.3 KB Created: 2010-08-01 04:20:19 Authoring application: daceWis muleDoc

MD5: b016faa3ba6bb2f72b8d7f95cb2f1c7b SHA-1: 3f2c24572bcd688da29c83420ba2c880f618411a SHA-256: 826798ed9fab5a83effb857447d51fd1a7469fbe3470e2f2b131bb0a6242a760

66 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains an embedded script payload, indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic. The ML classifier strongly flags this PDF as malicious. The presence of embedded files and XFA forms suggests a complex document structure likely designed to conceal or deliver malicious content. The primary attack vector appears to be exploiting a PDF vulnerability to execute this embedded script.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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 7

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0008.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0x17AB	84 bytes
`embedded_file_obj0009.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x185C	228 bytes
`embedded_file_obj0010.bin` `8890ecbfba1d8a2cfe5df7d8b02fcd61ab436d1cc296448a98977d36e9258fd8`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x194D	1102 bytes
`embedded_file_obj0011.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x1C13	199 bytes
`embedded_file_obj0012.bin` `af4f1c1d8e3871b76f15227bc65321fdff2bb046a389899eb64b793b13c8a053`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x1D06	54876 bytes
`embedded_file_obj0013.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x2A9C	77 bytes
`embedded_file_obj0014.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x2B43	56 bytes

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