Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd86eadae265daee…

MALICIOUS

PDF

42.9 KB
MD5: 8a71f1dcdc24537d6c6bff7460664b0f SHA-1: c514aeff9646fa9d9348a4ed41899e887435fa69 SHA-256: dd86eadae265daeead0af04b7457554bdc015399c77b0cd7cce7f183f2f8d7c8
196 Risk Score

Malware Insights

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

The PDF file contains embedded XFA forms with executable scripts, a critical finding indicating a potential exploit. ClamAV detection as 'Pdf.Exploit.Agent-36830' further confirms its malicious nature. The embedded scripts are likely designed to download and execute a second-stage payload, leveraging the XFA vulnerability.

Heuristics 7

  • XFA form contains risky executable script high CVE related PDF_XFA_SCRIPT
    PDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
  • ClamAV: Pdf.Exploit.Agent-36830 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36830
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • 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/xci/1.0/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/
    • http://ns.adobe.com/xfdf/
    • http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
0a2224c4023b216235b61c3fc4dd17bbfac1ab23a545687f51b97604cf654712		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xD7 46 bytes
embedded_file_obj0009.bin
825c96a9a0c8ba20bcf9602d3749adacffd017f96426e199f8dfd8910bc02ef9		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x14D 685 bytes
embedded_file_obj0010.bin
982e20dbb278e7bb9167a49d41bca4eba40d0f35d12088fdf01e6cb6fead89b4		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x445 165 bytes
embedded_file_obj0011.bin
f8318463949c1b79997bba2d3033899838e2027b9a33a0201b424bb20f7883a8		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x535 435 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x733 190 bytes
embedded_file_obj0014.bin
beb23443603caf27d3f310a532efe0dc80b2789616c1a8aa5d5bd8ebfc38ced1		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x83E 40998 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely
embedded_file_obj0015.bin
03172373f36e220deaea3baf69186e2a8bef99633879227f39b2a0b4510201ee		 pdf-embedded-file PDF EmbeddedFile object 15 at offset 0xA8AE 138 bytes

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