Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e16bdc8d8499bb7…

MALICIOUS

PDF

42.6 KB
MD5: 71fea46f6c025314e2b7032773441a4b SHA-1: 38f2024a1b8518fbf7d2f0fd6e1b0c843631e767 SHA-256: 0e16bdc8d8499bb78373fb41d319143c6e5361e66263216313f98e3222ddd71f
176 Risk Score

Malware Insights

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

The PDF document contains embedded scripts and is flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Exploit.Agent-36830'. The presence of embedded files and XFA forms suggests an attempt to exploit client-side vulnerabilities for execution. While no specific URLs were found to be malicious, the overall structure and detections point to a malicious PDF designed to deliver a secondary payload.

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
c170079356a57ba959c9cd45214d4fb9262e73b3a44411d06d6961d28e8d7339		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x13C 687 bytes
embedded_file_obj0010.bin
69650a61091a018036679a3439cc6a018b6a91ebe9e0e3a6b36ceb04d6491a4f		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x436 160 bytes
embedded_file_obj0011.bin
81035f646eea2aa948172f88aefa7bb4182ba9b430c12a8f731e6ea20ca4e83d		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x521 444 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x728 190 bytes
embedded_file_obj0014.bin
6d7e5e3af61a70953e09e0738fcc4e4cc787a0c704de48392e9480c49e7d494f		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x833 40862 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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