Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2e22f5b1460ebe3…

MALICIOUS

PDF

11.7 KB
MD5: 77359844398a82fb461d12284f6a25e2 SHA-1: 4da4539cd30ae9e3e51a7b9eca82148826823df2 SHA-256: a2e22f5b1460ebe382d4170fd05f5d1c33984f13d1bcefa56328230fea2ded2c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF file contains an embedded script payload, as indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic. ClamAV detection of 'Pdf.Exploit.Dropped-78' further confirms its malicious nature. The embedded file and XFA form suggest a delivery mechanism for an exploit. The exact nature of the exploit payload is not detailed, but the presence of embedded scripts points to a direct execution attempt.

Heuristics 5

  • ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • 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.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • 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_file_obj0008.bin
8bbc984486d8ac39d180748efdc6eabf685ee0742e423e1dd3641cae470bbcd8
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11177 bytes