Malicious PDF — malware analysis report

Static analysis result for SHA-256 304a3e3d9355a754…

MALICIOUS

PDF

42.9 KB
MD5: 3a60f77c797a2703cff38242e3df96d7 SHA-1: 38950bad3cdc3f4e66c5bc0c56b064b2dd8568b6 SHA-256: 304a3e3d9355a7549f70a7fa55f8a3b16705845ca231c2c7f41d8cd39d1ee5f8
156 Risk Score

Malware Insights

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

The PDF file contains embedded scripts and is detected by ClamAV as Pdf.Exploit.Agent-36830, indicating it exploits a known vulnerability. The embedded artifacts suggest the file is designed to download and execute a secondary payload. The presence of XFA forms and embedded files further supports the exploit delivery mechanism.

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
97c519c0c48c13f1017642ed75cb7894a322214175dd7e073448858ca1100d6c		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x13C 685 bytes
embedded_file_obj0010.bin
8259db878f85521b2ee9c7ec108d34b19d3b6c900af7d501b5135c2cd3dcfde6		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x434 168 bytes
embedded_file_obj0011.bin
78d2d8f452e9870ebe9d9f3266b69dfd49247ae72ce74298e9b901e1f68e8724		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x527 449 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x733 190 bytes
embedded_file_obj0014.bin
ec2aba78aecdbb7d2f772bd25b09c1eb4fe0921496023ccf0404a0a77a116ca9		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x83E 41152 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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