Malicious PDF — malware analysis report

Static analysis result for SHA-256 eabae736d02d82fa…

MALICIOUS

PDF

18.3 KB
MD5: 649e2ad36229e98a244e18f07879dd45 SHA-1: 16409103dc0664ea9f0a23a9078869adb37aab08 SHA-256: eabae736d02d82faa03a327e2281aff25d76a60aabef00f0fc48099864009412
148 Risk Score

Malware Insights

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

The PDF file utilizes XFA forms, a known vector for exploitation. Critical heuristics indicate embedded script payloads and ClamAV detections (Pdf.Exploit.Dropped-78 and Pdf.Exploit.Agent-36809) confirm its malicious nature. The embedded URL, while seemingly benign, is part of the document's structure that facilitates the exploit. The primary attack pattern involves luring the user into opening a malicious PDF that executes an embedded exploit.

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.
  • 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://www.xfa.org/schema/xfa-template/2.5/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_00000329.bin
b0dafafdaa66a1b3a7721c84a83351290c9499d61ec41fe0f9e56d79e3086297
pdf-embedded-script PDF raw stream script payload at offset 0x329 17988 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36809
Obfuscation or payload: unlikely