Malicious PDF — malware analysis report

Static analysis result for SHA-256 88252b3bd0315fcc…

MALICIOUS

PDF

43.4 KB
MD5: 6eb9b8df06a35a0e0cdc68a4c81aa412 SHA-1: 8579052dd303831b43b5a004f51345216df586aa SHA-256: 88252b3bd0315fcc6916da42fef6d5b148480ea452406a49a7b4c3848c01945a
156 Risk Score

Malware Insights

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

The critical ClamAV detections indicate this PDF file is malicious and contains an embedded exploit. The 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic further confirms the presence of a script payload within a PDF stream. While no specific document body content or script was directly readable, the embedded nature and exploit detection strongly suggest it's designed to deliver a secondary malicious payload upon opening.

Heuristics 6

  • ClamAV: Pdf.Exploit.Agent-36834 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36834
  • 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/
    • http://ns.adobe.com/xfdf/
    • http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
04462f810d6eacdacecc9d0a5f3f81bebc722af4415e04da19b520338f642b51		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xD7 67 bytes
embedded_file_obj0009.bin
913ed85e7dca1f931f6c0305890ba7362d98e12b976551f124a6418be15e413c		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x162 690 bytes
embedded_file_obj0010.bin
1c5b7971dff586207e8235b49916e2677297f244f218ae7d19c6ac9623332af8		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x45F 100 bytes
embedded_file_obj0011.bin
bcc5104261d6f375f19be8423c1f7737f44d70d0038d81c823defce9a044cdb6		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x50E 590 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x7A7 190 bytes
embedded_file_obj0014.bin
c04b31fe0326d849a09f715bf6b6b0f0674ff08f7eda41534383c4f02a83acb3		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x8B2 41427 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36834
Obfuscation or payload: unlikely
embedded_file_obj0015.bin
03172373f36e220deaea3baf69186e2a8bef99633879227f39b2a0b4510201ee		 pdf-embedded-file PDF EmbeddedFile object 15 at offset 0xAACF 138 bytes

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