PDF malware analysis — malicious · 97445d23413e3c77

MALICIOUS

PDF

42.6 KB

MD5: 0ee93229bd1e2d4571a81d8125a0a319 SHA-1: b7c4627e2abdce9193ebe22543e853384b7edcbd SHA-256: 97445d23413e3c771cfb2aeaa7243c4b210496e5c8fd7c9956ca89e81f572ddb

226 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious File T1204.002 Malicious File: User Execution T1059 Command and Scripting Interpreter T1059.004 Command and Scripting Interpreter: PowerShell

The PDF file contains embedded XFA forms with executable scripts, a critical finding that indicates a malicious intent. ClamAV detection of 'Pdf.Exploit.Agent-36836' on both the main file and an extracted artifact strongly suggests this is a known exploit delivery mechanism. The embedded script payload is likely responsible for downloading and executing a second-stage payload, although the exact script content is too obfuscated to determine specific actions.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 7

XFA form contains risky executable script high CVE related PDF_XFA_SCRIPT

PDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
ClamAV: Pdf.Exploit.Agent-36836 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36836
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://ns.adobe.com/xdp/
- http://www.xfa.org/schema/xci/1.0/
- http://www.xfa.org/schema/xfa-template/2.5/
- http://www.xfa.org/schema/xfa-data/1.0/
- http://ns.adobe.com/xfdf/
- http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 7

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0008.bin` `0a2224c4023b216235b61c3fc4dd17bbfac1ab23a545687f51b97604cf654712`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xD7	46 bytes
`embedded_file_obj0009.bin` `939197344ac9b69568e50bffd7030c0758e7534fa58c18426d6dc1791e6bc763`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x14D	690 bytes
`embedded_file_obj0010.bin` `9b3e3137f794b4b7749fdedcd46db5dc4d1f380440711c5edf7fc00a7458da87`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x44A	125 bytes
`embedded_file_obj0011.bin` `8a756380487ecaa092f9c84fc1e007fb19f6ff6d9edd44532a79e458b24ff9be`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x512	396 bytes
`embedded_file_obj0012.bin` `d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x6E9	190 bytes
`embedded_file_obj0014.bin` `3225737656a585d547de80133a14f6a81e07d47280a8ef482ef61e036dc351f3`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x7F4	40872 bytes
Detection ClamAV: Pdf.Exploit.Agent-36836 Obfuscation or payload: unlikely
`embedded_file_obj0015.bin` `78b09463af5cd373870eae2e3e83de87b7f6b659e0d0117ab4c09d90ebb2ad95`	pdf-embedded-file	PDF EmbeddedFile object 15 at offset 0xA7E6	68 bytes

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