Malicious PDF — malware analysis report

Static analysis result for SHA-256 3035feb1f27e8ad2…

MALICIOUS

PDF

43.0 KB
MD5: 2ac5364445362d15f04afa9765eefcb6 SHA-1: 79630761c53f2d56aecb729c5e472d6424f5c36b SHA-256: 3035feb1f27e8ad299e8f63379ad539471d023d04b3a04f2ea7e9482c7d5673c
228 Risk Score

Malware Insights

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

The PDF file contains XFA forms with embedded executable scripts, as indicated by multiple high and critical heuristic firings including ClamAV detection for Pdf.Exploit.Agent-36830. The embedded script payload is designed to exploit vulnerabilities within the XFA form processing, likely leading to the execution of malicious code. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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
a706b038c9a07004dc67fdabaaf3f4ff057fc6d36b444915f2c40b387d56fa7c		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x14D 689 bytes
embedded_file_obj0010.bin
65e0cd26724bbac83c6001dfbee5727d8d7dc958f364f02a819dd2cf25ba393a		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x449 160 bytes
embedded_file_obj0011.bin
1c694336ad82245445c0cfaa477dcd49fe9b16d80c4a07ed4b42c2815cf781be		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x534 427 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x72A 190 bytes
embedded_file_obj0014.bin
2559a758bb185c9772d0a34ba872cf81bbcf19c5879851a98e0ae3f242ebdb2c		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x835 41081 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 0xA8F8 138 bytes

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