Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dc203a1dce44166…

MALICIOUS

PDF

12.0 KB
MD5: 520be476e274583d85b61d835eb3440f SHA-1: bb9523e750913b47aee66334b2e6781bb3011410 SHA-256: 2dc203a1dce441662b01b50e3b356e669edbf2949f19ed58ffa5a48f8308db6a
96 Risk Score

Malware Insights

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

The PDF contains embedded content and a script payload, as indicated by the PDF_EMBEDDED and PDF_EMBEDDED_SCRIPT_PAYLOAD heuristics. ClamAV detection as Pdf.Exploit.Dropped-78 further confirms its malicious nature. The embedded script likely attempts to download and execute a second-stage payload, although the script content is too obfuscated to determine the exact mechanism. The presence of XFA form elements also suggests a potential exploit vector.

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
dd45b95097054bbb25f46dfb23682da4a25f895be3cfac7b141d8ada0ad3e1a5
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11579 bytes