Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ff8a64c518844f…

MALICIOUS

PDF

43.2 KB
MD5: 43888deddc50c74e01b214b23d58fc84 SHA-1: e2b5604631332dbb1710ec4876a050940c6a9af7 SHA-256: 01ff8a64c518844f3135fdb6ae8adb3ab39a559a31c317a8cbe8583c889ff82c
176 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV with the signature Pdf.Exploit.Agent-36830, and an ML classifier also flagged it with high confidence. The PDF contains embedded files and an XFA form, indicating a potential exploit targeting PDF viewers. The embedded script payload suggests the execution of a secondary malicious component.

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 0xD7 46 bytes
embedded_file_obj0009.bin
10fcfbfa86f4b88265558e147253be5b227a21896202ad873553ba691fa98f9f		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x14D 683 bytes
embedded_file_obj0010.bin
0fe7596619d7974f48bb0928a6efec8cf5bea691a6bfb71cb5fbc41c3ca73638		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x443 168 bytes
embedded_file_obj0011.bin
3a9a3544fe131c9e6039330aad9ca81aa69cc5d630da7d77479d0620aa3f2c0a		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x536 429 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x72E 190 bytes
embedded_file_obj0014.bin
9fde37e3b13d59f78a894273614c104adbcc4e74f36af7ed93d43434f39e2351		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x839 41444 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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