Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3fa24ae21342d1e…

MALICIOUS

PDF

42.8 KB
MD5: 3ccc347bf7e91ea9935415a1ba12d0d8 SHA-1: ff2616b5aa99a8c6d23fb4b86a1b39abff50bdac SHA-256: b3fa24ae21342d1e68cb308c3a0914ac0735fc88a48e674d0e263e823b9ce77e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment

The critical ClamAV detection 'Pdf.Exploit.Agent-36830' strongly indicates a known PDF exploit. The presence of embedded files and scripts, along with the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic, suggests the PDF is designed to execute malicious code upon opening. The embedded artifact 'embedded_file_obj0014.bin' is likely the delivered payload.

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
340365f8d75896cb7f72c79d2f81a67b18021274ea1373dbfc27ae4efd3141e3		 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
50ed9a18873aa320a038fcbd2e8bc9507099f3ffbbe9e77f081fb26b99ad466c		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x523 459 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x739 190 bytes
embedded_file_obj0014.bin
725d07b0bcb51c0c58a25a60d91f4b748dde33ffbfce64f9e6c9e131021f4dac		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x844 41020 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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