Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff8a59ac9a0cddc1…

MALICIOUS

PDF

42.9 KB
MD5: 587d81007a1edea0ea9db7c84b7f2146 SHA-1: 3fd537cd2a8009e12c2020ca070c7a38b8469619 SHA-256: ff8a59ac9a0cddc1ef8f54e71e51c31c666fcfabffd30fcf6269bcaa1eda2d27
156 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution

The file is identified as a malicious PDF by ClamAV with the signature Pdf.Exploit.Agent-36834. Static analysis revealed embedded files and scripts within the PDF structure, indicating an attempt to exploit vulnerabilities. The embedded script payload suggests the PDF is designed to download and execute a second-stage payload.

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
0ea5542ed2c76197497839b0dfe8dab386f00c6e2a748d82e69fde6f75c77e9d		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x162 691 bytes
embedded_file_obj0010.bin
1c5b7971dff586207e8235b49916e2677297f244f218ae7d19c6ac9623332af8		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x460 100 bytes
embedded_file_obj0011.bin
2cc67896d29468ab15bb77a1c21744cf9510072293b124f2df37e12bf54792e5		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x50F 532 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x76E 190 bytes
embedded_file_obj0014.bin
c875bf3cf6c3815554b41e7acc9502d87de9d787eb2bd115663cd8366e50981f		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x879 40913 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36834
Obfuscation or payload: unlikely
embedded_file_obj0015.bin
51d6d76eddb1746e412f89f4d1c1b0d620c60fb4a5641c018e93871be63968a9		 pdf-embedded-file PDF EmbeddedFile object 15 at offset 0xA894 147 bytes

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