Malicious PDF — malware analysis report

Static analysis result for SHA-256 195f7c0cb3e76a7d…

MALICIOUS

PDF

42.5 KB
MD5: 73886edddb900f9fd4195f68f520fd74 SHA-1: 0b027adcdbe3d02b07aa82ec7c1b3ebf93ff1904 SHA-256: 195f7c0cb3e76a7dff1d4362577edae542d0af1a35d6aea2bdca0ef5fcadfee5
216 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document contains XFA (XML Forms Architecture) which is known to be used for embedding executable scripts. The critical heuristic 'PDF_XFA_SCRIPT' and the ML classifier strongly indicate malicious intent. The embedded script likely attempts to exploit a client-side vulnerability to execute a payload, as suggested by the ClamAV detection 'Pdf.Exploit.Agent-36830'.

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 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 script payload in PDF stream low 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 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
848472309916c4ddb156787bdfc7e9bdcca1c33fe3b5dfdb30e02c1b3e7e3e6e		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x14D 689 bytes
embedded_file_obj0010.bin
97314d9231379623057a8a77eeb79f9354bacffa50753a0f63b9e87e8d67dbf2		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x449 186 bytes
embedded_file_obj0011.bin
bf1fc83dbc98753d0e91e31005b635452d2a824aa902280e52c7297426b0c058		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x54E 388 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x71D 190 bytes
embedded_file_obj0014.bin
b328c5c567e9ee5337a7d0bf2027d7c4f689e93c4ead4068a0ebf1883531753e		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x828 40690 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely
embedded_file_obj0015.bin
78b09463af5cd373870eae2e3e83de87b7f6b659e0d0117ab4c09d90ebb2ad95		 pdf-embedded-file PDF EmbeddedFile object 15 at offset 0xA764 68 bytes

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