PDF malware analysis — malicious · 943eec861d90bed5

MALICIOUS

PDF

18.3 KB

MD5: 3200601d71708f263079aa83d8933136 SHA-1: 579ac96215697e36c693ae438c9a6e56f829e6c2 SHA-256: 943eec861d90bed51e4ac81aa09b0dd10fec1778f83eb71359ad6394e17238cb

178 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains an embedded script payload, as indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic and confirmed by ClamAV detections (Pdf.Exploit.Dropped-78, Pdf.Exploit.Agent-36809). The ML classifier also flagged this PDF with high confidence. The embedded script is likely responsible for downloading and executing a second-stage payload. The presence of an embedded URL further supports the malicious nature of the document.

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` `dd7ac97348a9e5daa15ca337933d37b10f044b808e892b790653682975525724`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	18038 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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