PDF malware analysis — malicious · a240c358f23bd0c8

MALICIOUS

PDF

14.6 KB

MD5: 0b73675b63aeefb47f273d9c17c909bb SHA-1: 8b71936d251b9b39a134cfe3d1abb3192c4154d6 SHA-256: a240c358f23bd0c8c4c7224c7db8f120097c39e6ddc869e2ebd17d506cdb8dd3

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious File

The PDF contains an embedded script payload and was flagged by multiple detection engines, including ClamAV, as a malicious exploit. The embedded script is likely responsible for downloading and executing a secondary payload, as indicated by the 'Pdf.Exploit.Dropped-78' and 'Pdf.Exploit.Agent-36809' detections. The presence of an XFA form further suggests a complex exploit 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` `21a5b84e44190b2d9907fc564f00656cac1b6d3b8775ff5028de427622cdffec`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	14195 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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