Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ac8b658466e1338…

MALICIOUS

PDF

42.7 KB
MD5: 3c9cd1cbca58c986c96b8eb00d7891a4 SHA-1: 5cbd3437a9bfe98c212585881783bc4f7ec6b28d SHA-256: 1ac8b658466e13388bf00099930f5a1865bf408e099244d825763de8ba2e9adb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious File

The PDF file contains embedded scripts and is detected by ClamAV as Pdf.Exploit.Agent-36830. This indicates the file is designed to exploit vulnerabilities within PDF viewers to deliver a malicious payload. The embedded artifacts and critical heuristic firings strongly suggest an exploit attempt.

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 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/

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
2de0cd8d6e5f4148097c3e66aaafa8fee03e64c307f82ddf603de2856a9b3565		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x13C 689 bytes
embedded_file_obj0010.bin
8259db878f85521b2ee9c7ec108d34b19d3b6c900af7d501b5135c2cd3dcfde6		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x438 168 bytes
embedded_file_obj0011.bin
aab0ef3e0d32eae8dfbc4e1011f9460d8d917b58d368cb58af333fdee06b8a76		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x52B 450 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x738 190 bytes
embedded_file_obj0014.bin
df44ffc29a69ac1b48d4585bea9d38f205689946e93d55b47b5e6bcfcbee42a8		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x843 40938 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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