PDF malware analysis — malicious · 187224cd3a0a8826

MALICIOUS

PDF

14.7 KB

MD5: 74ca59771ff2994992f6cdb24596a72b SHA-1: aabab21c49a0e9ff61b329f6a0ce75e1647aa423 SHA-256: 187224cd3a0a882634d7ddc125723d2509d1021cdfe1fe20ef31f2edc58c58d5

168 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF file was flagged as malicious by multiple engines, including ClamAV, and exhibits characteristics of an exploit. The embedded XFA form and script payload indicate an attempt to execute code. The embedded script, written in JavaScript, likely serves to download and execute a secondary payload, as suggested by the ClamAV detection names 'Pdf.Exploit.Dropped-78' and 'Pdf.Exploit.Agent-36809'.

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` `a815cee84e83c382b56ff6ba4b8e9f0270026451032e0f19e978a2810f7532a9`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	14302 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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