PDF malware analysis — malicious · c59bca7a7f098af7

MALICIOUS

PDF

14.6 KB

MD5: 4c823d226c940d4fbb173a91d524efd3 SHA-1: b2abe2b8c81d904aa5155153cb851968474ca56b SHA-256: c59bca7a7f098af70c5a324e6db619c981892e32b96848bfce167de443c18ae1

148 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file utilizes XFA forms and contains an embedded script payload, as indicated by the PDF_XFA and PDF_EMBEDDED_SCRIPT_PAYLOAD heuristics. ClamAV detections confirm its malicious nature, identifying it as Pdf.Exploit.Dropped-78 and Pdf.Exploit.Agent-36809. The embedded script is likely responsible for downloading and executing a secondary payload, although its exact functionality is not fully detailed in the provided evidence. The presence of an embedded URL further supports the delivery mechanism.

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` `6a3be0055b57588d6ca1a1b21dd8b8e186b52352fb1997e407e21395b4a3095f`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	14242 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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