PDF malware analysis — malicious · 5bb8da6daa72d3cf

MALICIOUS

PDF

14.7 KB

MD5: d209e8047846ea56256d6dd8697bd89b SHA-1: 1ce04dd647ab325820e0f9a0ff4327430bf1364d SHA-256: 5bb8da6daa72d3cf4d7c3db3a8299aef2a3f1d5554e008b386fb5f6374dd84e2

168 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF utilizes XFA forms and contains an embedded JavaScript payload, strongly indicating it's designed to execute malicious code. ClamAV detections confirm its malicious nature, flagging it as an exploit dropper. The embedded script likely downloads and executes a second-stage payload, a common technique for malware delivery.

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.
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
Embedded script payload in PDF stream low 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.
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` `a695a0ad3925e774572fbce64b2d9058bde85bb7c672c300e9050c84863fc1e4`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	14293 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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