Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc80a71f5605bda7…

MALICIOUS

PDF

12.0 KB
MD5: 26d51c7a15a87caf35fc1130a89ca6c2 SHA-1: d51db873085b8e712aca7248f01af774789efee7 SHA-256: cc80a71f5605bda7216c22427bd921f90bb2b5ddbcfab11b3b1dd831489ff4dc
128 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including ML classification and ClamAV detection as 'Pdf.Exploit.Dropped-78'. The presence of an embedded script payload and an embedded file further indicates malicious intent. The embedded URLs, while not directly malicious, are associated with XFA forms, a known vector for PDF exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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
4c354dc57da0f107a36dc135641b8c55506253d1bdac3cba25cf0701fee3d4b8
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11538 bytes