PDF malware analysis — malicious · 53303225a2b57c07

MALICIOUS

PDF

15.1 KB

MD5: 445f50e6fb147eda6c051d3045fd1c6f SHA-1: 3d213ded37b4f522480c70f618a386aba54cc830 SHA-256: 53303225a2b57c07d3e8d7214629c01c1b4be4ff49ea60c291ac52d899db654e

148 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file utilizes XFA forms and contains an embedded script payload, as indicated by multiple heuristic firings. ClamAV detections confirm its malicious nature, specifically identifying it as Pdf.Exploit.Dropped-78 and Pdf.Exploit.Agent-36809. The embedded script is likely responsible for downloading and executing a second-stage payload. 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` `641eaf335a2d4029c8d1030a50a498b3eba07f293ba68b190d4f8f1d14b486b5`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	14708 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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