PDF malware analysis — malicious · ddafc455a37752df

MALICIOUS

PDF

18.3 KB

MD5: dd0eff07c685bf553783a5a93b92780c SHA-1: 1bd60e379db4874724180b9522e40f42a51eb66a SHA-256: ddafc455a37752dfc3b55ab922acfc55d88ec93bba608086307974ddc5bfd5ed

178 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file exhibits characteristics of a malicious document, including the use of XFA forms and embedded scripts, as indicated by multiple heuristic firings. ClamAV detections further confirm its malicious nature. The embedded script payload is likely responsible for delivering the secondary exploit or payload, although its exact function cannot be determined due to obfuscation. The presence of an embedded URL suggests a potential download or redirection vector.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Exploit.Agent-36789 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36789
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_00000325.bin` `31cdc4ea771ce0cf3f6051d067c0b25cac32cb827d7acbd62e93d80331172826`	pdf-embedded-script	PDF raw stream script payload at offset 0x325	18048 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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