Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2b1362f52f60015…

MALICIOUS

PDF

19.0 KB
MD5: 620239c7b0e384e393dd639aab0add50 SHA-1: 9e2fe1fec394bb84e3f33f38c0d01733569d2caf SHA-256: d2b1362f52f600155b60a54fbd2439455affe720b5a20ff70890392da318ae71
96 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged as malicious 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 XFA form elements and an embedded file further supports the malicious nature of the document. The embedded script is likely responsible for downloading and executing a second-stage payload.

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
d4f498cae25e2d03cb4493d397c73e6dbcfdd9f40eef84c734375dd19d6a1faa
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18702 bytes