PDF malware analysis — malicious · 165905ce0b2318da

MALICIOUS

PDF

18.3 KB

MD5: 2c75443753ae7418d90576ca492a4813 SHA-1: 1a7dbfadd0d3c77195689620ad51e791a2dfcbd5 SHA-256: 165905ce0b2318dae5812deecc1c8e60b9ff420a4e374cde873a6e6da7a8be81

168 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is a PDF file identified as malicious by multiple engines, including ClamAV, which detected it as 'Pdf.Exploit.Dropped-78'. It contains embedded XFA (XML Forms Architecture) which is known to be a vector for exploits. The embedded JavaScript, though heavily obfuscated, is indicative of a payload designed to execute further malicious code, likely by downloading it from a remote source. The presence of an embedded URL, even if benign, suggests an attempt to interact with external resources.

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` `6489f9b7ef6186d07ce5656502edabb6c1b2df80519cc664f526a52b0971bcb4`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	18047 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.