Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd85d00244f72ab4…

MALICIOUS

PDF

27.5 KB
MD5: 4ddebb2db5869fd7b5cc71f53b52d983 SHA-1: 24a0bce0425505e773795008d01c9e33b533069b SHA-256: fd85d00244f72ab439b864baa631c0a1442452f68fd188719a4af8bced135d26
96 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1566.002 Phishing: Spearphishing Attachment

The PDF file contains embedded script payloads and is flagged by ClamAV as Pdf.Exploit.Dropped-78, indicating it's designed to exploit vulnerabilities. The presence of embedded files and XFA forms further supports its malicious nature. The embedded script, though obfuscated, likely attempts to download and execute a second-stage payload, a common technique for malware delivery.

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
744ed25f63eb001c0ac2fceb41efa154c1110b96d01e2d0a52cecddb85678e27
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 27351 bytes