Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe5c10870a6c42d2…

MALICIOUS

PDF

11.6 KB
MD5: 87da9b81375099698e084e0a828919fb SHA-1: 4521a23662fbc9629ec0b5445c98ef503d3797ed SHA-256: fe5c10870a6c42d2d93319195ca529d696353a795443402ef27f58ece89000b6
96 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV with the signature Pdf.Exploit.Dropped-78. Static analysis revealed an embedded script payload within a PDF stream, indicating an attempt to execute malicious code. The presence of an embedded file further supports the malicious nature of the document, likely serving as a dropper for further stages of an attack. The confidence is high due to the critical ClamAV detection and the presence of an embedded script.

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
18e3902290ca20f93e5d72e579f0060ad162ced12c40977b348101f1f5058c7c
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 11106 bytes