Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b037c5bc55cdc7d…

MALICIOUS

PDF

19.0 KB
MD5: 7f0a06b85f6a5a790da4bc8d760dc215 SHA-1: 90dbfa6c1db9e0ed479ab3c07a0b89a3b9a0f788 SHA-256: 3b037c5bc55cdc7da1654ff913221a2372baeec8cb20074f73c7bee748352aff
96 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1553.005 Mark-of-the-Web Bypass

The PDF file contains embedded content and an embedded 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 its exact functionality is obscured. The presence of XFA form elements suggests a potential avenue for exploit.

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
be204e8e4facb05c2c114f7b53e0809fd5fd8e1f8cbc669262b79707d6b3c367
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18698 bytes