Malicious PDF — malware analysis report

Static analysis result for SHA-256 64619dae51145153…

MALICIOUS

PDF

8.0 KB
MD5: 6c6b410c8a71e9efc673d357fb4455be SHA-1: 039d9ae59489b537e4eed8e5aeacc1760801a561 SHA-256: 64619dae5114515358d35672a21cd7053438df10e4f6a29e808e1f1f84932b97
116 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating it contains an exploit. The presence of XFA forms and embedded files suggests it is designed to deliver a malicious payload. While no specific URLs were found to be malicious, the embedded nature of the exploit and payload points towards a targeted attack, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

Heuristics 5

  • ClamAV: Pdf.Exploit.Agent-36830 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36830
  • 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 5

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
b44bbe1f7263c93cd8862ff5c8e1b7cd46ffc820084b848cf304e839e7c29ad0		 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
80b4a7065874c077cedecfa00ba8a98d996464c1b40fbb5178c898ed82c9fad1		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x54E 392 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x721 190 bytes

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