Malicious PDF — malware analysis report

Static analysis result for SHA-256 23308a24f708aece…

MALICIOUS

PDF

79.1 KB
MD5: 877bcace5687f7d951791b09538f7d16 SHA-1: eddc014fb02c476dcc5187897bb12cd6aa098672 SHA-256: 23308a24f708aece9ebc4ac441439656d8b1e2e76998df3201c83e76e562ad00
148 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious Attachment T1566.002 Phishing: Spearphishing Attachment

The PDF file contains an XFA form and an embedded script payload, indicating a malicious intent. ClamAV detections confirm this, identifying it as Pdf.Exploit.Agent-6136306-0 and an extracted JavaScript exploit (Js.Exploit.HTML-29). The embedded script likely attempts to download and execute a second-stage payload, leveraging the XFA form for exploitation. The URLs present are related to Adobe XFA but are not directly indicative of the attack.

Heuristics 5

  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • 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://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_0000023c.bin
6ea59b87a5ffae99dabff15578d4604f54d032ae41862261b5f795ba68ee7413		 pdf-embedded-script PDF raw stream script payload at offset 0x23C 80285 bytes
Detection
ClamAV: Js.Exploit.HTML-29
Obfuscation or payload: unlikely

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