Malicious PDF — malware analysis report

Static analysis result for SHA-256 c44ec7e802bb4056…

MALICIOUS

PDF

19.2 KB
MD5: b2ad34988bc30cbe26531df1c82e8605 SHA-1: 15d63b2223dc4db32f0c4c3862353bc9ae3a6671 SHA-256: c44ec7e802bb4056fbc42467550cccbda65aa5e2228bce92e061ecd8e296e79a
126 Risk Score

Malware Insights

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

The critical ClamAV detection and high ML classifier score strongly indicate malicious intent. The PDF contains embedded script payloads and an embedded file, suggesting it's a dropper or exploit document. The embedded URL heuristic also fired, though the specific URLs extracted are benign or unknown. The primary indicator is the ClamAV signature 'Pdf.Exploit.Dropped-78', which points to a known malicious PDF exploit.

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
2946f867554b7bec0c2ccdae717583ddded1e4a9d6037c043398caa0a4e6fb95
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18854 bytes