Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab25562fb475660b…

MALICIOUS

PDF

18.9 KB
MD5: 00a78607d6387e35878fb585bc0fb7cc SHA-1: dc8df19613ee0c8a8e5498a62080da3c08d6f8c8 SHA-256: ab25562fb475660b7281c1f5c1fbe1a09ce4ac9210cea297e3cbdfd2a075bdea
126 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a critical ClamAV detection (Pdf.Exploit.Dropped-78) and a high ML classifier score. The presence of an embedded script payload and XFA form suggests an exploit attempt. While no specific family is identified, the PDF structure and embedded content point towards a common exploit delivery mechanism.

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
94ed1793fbd14daf1201c633c2b8cf9ed954e6204e98f54040a2c9f15976eb97
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18594 bytes