PDF malware analysis — malicious · bc137a7a55925db7

MALICIOUS

PDF

18.2 KB

MD5: 35e40f8b3d982ce2be554d68c937f7e4 SHA-1: 599724027d80132cc22d499c88073b44c0a41260 SHA-256: bc137a7a55925db7364a4cdcd0b6ac39a162afa1d99e48f1d40ffea3baa7a049

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution: Malicious File T1566.002 Phishing: Spearphishing Attachment

The PDF file contains an embedded script payload and triggers multiple high-severity heuristics, including a critical ClamAV detection for 'Pdf.Exploit.Agent-36789'. The presence of an XFA form suggests an exploit targeting that functionality. The embedded URL is likely part of the exploit chain or a command and control beacon.

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` `fa83278b781b211dd99d2fbec56098c069e02c781516441b4c7003aa6351f4b8`	pdf-embedded-script	PDF raw stream script payload at offset 0x325	17946 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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