Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec123cc98f72b033…

MALICIOUS

PDF

18.8 KB
MD5: 44825067ddc44531eb2a681e73d2ad13 SHA-1: f9dcddecdb781d519df7e6eb360a87bcb8dbb20e SHA-256: ec123cc98f72b03311792083a45a6b59456d94eed57fa5db6e09d2c84f4f2390
96 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File

The PDF contains embedded script payloads and is detected by ClamAV as Pdf.Exploit.Dropped-78. The embedded file and script suggest it is designed to exploit vulnerabilities and download a second-stage payload. The presence of XFA forms and embedded files are common techniques for delivering exploits.

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
236ba0b6e48f2df64635e2448e6e067d5e8e273407266b31e4335e8cee259ad1
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18472 bytes