Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd0cc043a1e4cd8a…

MALICIOUS

PDF

26.1 KB
MD5: b30bb161552990fb1e4bea2f94a0cdfe SHA-1: fc71bb65709ed3cf144304d404263604a0d106eb SHA-256: fd0cc043a1e4cd8a62f5eb6a79594a3d77d4fe7243279f343019c71eb7f01f08
126 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ClamAV as Pdf.Exploit.Dropped-78 and a machine learning classifier with high confidence. It contains an embedded script payload and an embedded file, indicating it is designed to exploit vulnerabilities and drop further malicious content. The presence of XFA form elements and embedded URLs, though benign or unknown, are common in exploit documents.

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
fab50dd2592c57baf9c13ba3f47ffedea2a5122e1813cee3c0d4a864789bd39d
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 25987 bytes