Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4ea5cbeb7f54218…

MALICIOUS

PDF

14.7 KB
MD5: 61cb4c76e4055f229e59c54005fc1a69 SHA-1: 53db9bf6ae6584e3e09505d0c5f0bd8fbf9599d7 SHA-256: d4ea5cbeb7f542188ed693cdc612dda11da73ba40ced4bf9bbf572abb1899e0c
148 Risk Score

Malware Insights

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

The PDF file contains an embedded script payload and triggers critical heuristics related to PDF exploits and ClamAV detections (Pdf.Exploit.Dropped-78, Pdf.Exploit.Agent-36809). The presence of XFA form elements further indicates a potential exploit vector. The embedded URL, while seemingly benign, is present within the document structure.

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
0914f256403bc1a871d773d5f257298eaea4c3acf2cc740c0a3bb6244bdc63ca
pdf-embedded-script PDF raw stream script payload at offset 0x329 14281 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36809
Obfuscation or payload: unlikely