Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0620a7051b2bcf8…

MALICIOUS

PDF

14.7 KB
MD5: 529bc0b91c7cffe0fe752b5470f1b894 SHA-1: 51a0864bc288f855ee8a621478a3739ee855cb9a SHA-256: d0620a7051b2bcf89b6c67bf626dcab2c7c9cca1c3645e9c6dcf30cb0b42afc1
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 XFA form heuristics, indicating it's designed to exploit vulnerabilities. ClamAV detections further confirm its malicious nature, specifically flagging it as a dropped exploit. The embedded URL, while benign in reputation, 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
4fb4e2de67fdae13f1568cf3506a6a53f372215976f58f08f04015bd3839878e
pdf-embedded-script PDF raw stream script payload at offset 0x329 14284 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36809
Obfuscation or payload: unlikely