Malicious PDF — malware analysis report

Static analysis result for SHA-256 c74c24a5f6ea85db…

MALICIOUS

PDF

11.8 KB
MD5: ccd656e18a24e32e2efa335f0ad1c802 SHA-1: 6b15ac744ed5dacd7cf2f1e61e49e5560600e37b SHA-256: c74c24a5f6ea85db264df209cecd2babd85ef89c5a3951f91b6f9ed9680b0f56
126 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by multiple engines, including a high-confidence ML classifier and ClamAV. It contains an embedded script payload and an embedded file, indicating it's designed to drop and execute further malware. The presence of XFA form elements and embedded scripts suggests a common delivery mechanism 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
a9adc08a2b195b5912dc2cbea42fb8fcc8da0d6131e8f79ea0220c0ff9db6d47
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11302 bytes