Malicious PDF — malware analysis report

Static analysis result for SHA-256 1831b488ad248426…

MALICIOUS

PDF

42.8 KB
MD5: c03ba35383cf31f5fa4a109af25ea93d SHA-1: a65aa2ce076f089c8a491e181c23afb9762a3509 SHA-256: 1831b488ad2484267857c9b5bd19450e868d5f89e0a6509d9298400650867642
176 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The critical ClamAV detection and ML classifier strongly indicate this PDF is malicious, likely exploiting a known vulnerability. The presence of embedded files and scripts, along with the 'Pdf.Exploit.Agent-36830' signature, points to a classic exploit delivery mechanism. The attack pattern is likely to be spearphishing attachment, leading to client-side exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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/

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
0a2224c4023b216235b61c3fc4dd17bbfac1ab23a545687f51b97604cf654712		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 46 bytes
embedded_file_obj0009.bin
27f5328787b8ccf7836f1948e08bcc28c0553409d9ea824cb54486099735266e		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x13C 689 bytes
embedded_file_obj0010.bin
69650a61091a018036679a3439cc6a018b6a91ebe9e0e3a6b36ceb04d6491a4f		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x438 160 bytes
embedded_file_obj0011.bin
692efa347e17e735dc1b56e769fa796c85bfa8d28192ade3049e532e60f26ff2		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x523 454 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x734 190 bytes
embedded_file_obj0014.bin
78fccff972d3a193b9ebff1327d474c458b83dac072beb3341e209605830191f		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x83F 41021 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

Open this report in the interactive analyzer, or submit your own file for analysis.