Malicious PDF — malware analysis report

Static analysis result for SHA-256 d844f2f072d73f43…

MALICIOUS

PDF

14.8 KB
MD5: 63072fa4aa97bdf0861f003600a3cf81 SHA-1: 443b2f3f493d212e5c1a860ed097901d1ea56ce5 SHA-256: d844f2f072d73f431970baea8ddb77a227bb0b7bdacd098f988f4b81d6900214
148 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious PDF

The PDF file contains an embedded script payload and triggers heuristics related to XFA forms and embedded script execution. ClamAV detections indicate it is a known exploit dropper. The embedded script is likely responsible for downloading and executing a second-stage payload, as suggested by the 'Pdf.Exploit.Dropped' and 'Pdf.Exploit.Agent' detections.

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
79c065071333412cff6aa7bf1fdea2986ddf517ecba0f75813f5b1fbd6210982
pdf-embedded-script PDF raw stream script payload at offset 0x329 14422 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36809
Obfuscation or payload: unlikely