Malicious PDF — malware analysis report

Static analysis result for SHA-256 544fc64571ad527c…

MALICIOUS

PDF

12.1 KB
MD5: 208f553bb47581a122894aae3730d743 SHA-1: f1cde44c985acf9a15297b9379f35a6f3edbaccb SHA-256: 544fc64571ad527c4d56fe73c5124987517b0bbdc71f37f8a789203d8ab3c2ba
128 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a critical ClamAV detection (Pdf.Exploit.Dropped-78) and a high ML score, indicating malicious intent. The presence of an embedded script payload and an embedded file further supports this. While no specific script content was readable, the overall indicators point to a malicious PDF designed to exploit vulnerabilities and drop a secondary payload.

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
42976dd883dadc5be567cc48f8e91897a0975fd98b9779f2ed99e3cad0eea194
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 11613 bytes