PDF malware analysis — malicious · 164b77a578fb53c8

MALICIOUS

PDF

18.3 KB

MD5: 58d201e1adb7ad5d901f2292cf973de7 SHA-1: 0ea0edf142b7d9f63608fb2a24e4934d7acfbfcb SHA-256: 164b77a578fb53c83a0236382bb25f79579026b53907fcd8c695a2c392de9936

168 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF utilizes XFA (XML Forms Architecture) and contains an embedded JavaScript payload. ClamAV detections indicate it's a known exploit targeting PDF vulnerabilities. The embedded script, though truncated, suggests an attempt to execute malicious code, likely leading to the download and execution of a second-stage payload.

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.
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_00000325.bin` `1e24e28ea3ca481304327983f5a45eae67b493dac13e650abd2e7938a8384ead`	pdf-embedded-script	PDF raw stream script payload at offset 0x325	17994 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

Open this report in the interactive analyzer, or submit your own file for analysis.