PDF malware analysis — malicious · a3ac96e7878cd9ba

MALICIOUS

PDF

18.3 KB

MD5: 09e82944c7ac33e8ee92a308b79a5610 SHA-1: 327ce2f0279c9337f57753f9bd820bb34c1b3be3 SHA-256: a3ac96e7878cd9ba220615207021586e569a2873d9505e2c7065eb0e06ab1b12

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution: Malicious File T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating it contains an embedded script payload. The presence of XFA form elements and an embedded script suggests an attempt to exploit vulnerabilities or deliver a secondary payload. The embedded URL, while seemingly benign, is noted as part of the document's structure.

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` `9a026eca3a5303697cc2d9884d09a68f652fc0115a0bd406ec38cfa7d5f788de`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	18027 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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