PDF malware analysis — malicious · 08cd90b66ffd02e8

MALICIOUS

PDF

18.3 KB

MD5: 6c03c151210ee285a48a71cc3b42c38b SHA-1: 5c2f570f47d3396a7ee778f865726f6f68058188 SHA-256: 08cd90b66ffd02e866ab9933d19e8482f0e9edac9f0fff9cb497e79b750718e9

168 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains an XFA form with embedded JavaScript, flagged by multiple heuristics as malicious. ClamAV detections indicate it's a dropper for further malicious content. The embedded script, though heavily obfuscated, is characteristic of exploit-driven PDF malware designed to download and execute additional payloads.

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` `3f9f5961866a9b533d66b5a68f9cc2a9f2615d62d2065f1634a2b92b6d0343cf`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	17999 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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