PDF malware analysis — malicious · fbfc325c050889f4

MALICIOUS

PDF

14.7 KB

MD5: 181f9909f36d7076b437fdd3f6d6be5d SHA-1: 860279e2ef4eab207717c8b595b974fce6c6f669 SHA-256: fbfc325c050889f4e490b40a2419c432eeea375f1733bbb999df543df9d58ff0

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains an embedded script payload, as indicated by multiple heuristic firings including 'PDF_EMBEDDED_SCRIPT_PAYLOAD' and 'ML_NYX_PDF_MALICIOUS'. ClamAV detections 'Pdf.Exploit.Dropped-78' and 'Pdf.Exploit.Agent-36809' further confirm its malicious nature. The embedded script is likely responsible for downloading and executing a second-stage payload, a common technique for PDF-based malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
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.
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://www.xfa.org/schema/xfa-template/2.5/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_pdf_script_00000329.bin` `65813e44a1277b9d1c310cbd8a17772f3617885ae9a226e05c4fa06b1ceae9cb`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	14284 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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