Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac89a7a8ae71cd6d…

MALICIOUS

PDF

43.3 KB
MD5: 604eac6b3ae6f848f330222c02d7018a SHA-1: bd65dd8dc11b2c0c20c4c9318bd88c32a41c4524 SHA-256: ac89a7a8ae71cd6df5aa4ebe120c12397c62402f230c74964099254928e8f4b5
156 Risk Score

Malware Insights

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

The PDF file contains embedded scripts and is detected by ClamAV as Pdf.Exploit.Agent-36834. This indicates the file is designed to exploit a vulnerability within PDF viewers to execute malicious code. The embedded artifacts and heuristic firings strongly suggest a malicious exploit delivery mechanism.

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
bfb6c8010b53102141eaab979cca5c4272afc0c8ebe36dbcc3c9a362362727df		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x162 688 bytes
embedded_file_obj0010.bin
1870a8c90be73ebe36ae508f57c55ef58407515a4ad8c7e867914369cf2923c9		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x45D 99 bytes
embedded_file_obj0011.bin
6cd730d723a0f696eec60d950eda083f37cd15f45253b03b532380fdc44bfe56		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x50B 573 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x793 190 bytes
embedded_file_obj0014.bin
30122fa6c0bf1eed7ed8fa9ca8d9f9bd92e5ee77ff6886a634c6563ea4124f79		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x89E 41416 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36834
Obfuscation or payload: unlikely
embedded_file_obj0015.bin
78b09463af5cd373870eae2e3e83de87b7f6b659e0d0117ab4c09d90ebb2ad95		 pdf-embedded-file PDF EmbeddedFile object 15 at offset 0xAAB0 68 bytes

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