PDF malware analysis — malicious · 490d0c3cdeebd46a

MALICIOUS

PDF

8.0 KB Created: 2008-08-19 12:14:36 Authoring application: avast5XY

MD5: 0576ab7ac7a9add1d1ab0785341bcca9 SHA-1: 8b81007cf089139c59748a59929701b38e618b5c SHA-256: 490d0c3cdeebd46a68914c679995f157cca1912eda978df64a3fc2608af0975e

68 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF was flagged by a machine learning classifier with high confidence (0.999885) and also triggered heuristics for embedded script payloads and embedded files. The primary embedded artifact, 'embedded_file_obj0012.bin', is likely the malicious payload. The presence of XFA forms and embedded files suggests a delivery mechanism for further malicious activity.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

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
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

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 0x21C	84 bytes
`embedded_file_obj0009.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x2CD	228 bytes
`embedded_file_obj0010.bin` `c52dbeb504be2719c270224d74939130b7babb703490d6cbf0e9e37eef691ec2`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x3BE	1748 bytes
`embedded_file_obj0011.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x71B	199 bytes
`embedded_file_obj0012.bin` `d2ae2c24ab2535d10a988c2374601064eed4b41894c818de3e33dfb9a9e95635`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x80E	123384 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`embedded_file_obj0013.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x1B34	77 bytes
`embedded_file_obj0014.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x1BDC	56 bytes

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