Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ba7c5618a81abb1…

MALICIOUS

PDF

42.3 KB
MD5: 8818a2c414052042d7420165ee39552e SHA-1: b2725bb1c3a22741e418631d294688801308e882 SHA-256: 3ba7c5618a81abb1b31079a29b4aaf18e9a631f038dde8426f92d01444a475b3
196 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.007 JavaScript

The PDF file contains XFA forms with embedded executable scripts, a known technique for exploiting PDF vulnerabilities. ClamAV detection of 'Pdf.Exploit.Agent-36836' confirms its malicious nature. The embedded script is likely responsible for executing the exploit, leading to a compromise.

Heuristics 7

  • XFA form contains risky executable script high CVE related PDF_XFA_SCRIPT
    PDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
  • ClamAV: Pdf.Exploit.Agent-36836 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36836
  • 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
0a2224c4023b216235b61c3fc4dd17bbfac1ab23a545687f51b97604cf654712		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xD7 46 bytes
embedded_file_obj0009.bin
e1a60e9ff36ae01bff2485e1a26e7fbbdb5b6a4e8d64134fca54b114b30ade08		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x14D 690 bytes
embedded_file_obj0010.bin
cb5c2c085f74f108ea1568913da707c0f028f63f96dbe60adbaae8231243e227		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x44A 157 bytes
embedded_file_obj0011.bin
9ca51e6665d26fb5b535b63678ea0735b63aaf61ac2d5244358350bbcf4b6602		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x532 351 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x6DC 190 bytes
embedded_file_obj0014.bin
d741089a1c9b3eb8d3c02b41f9e47528249dee34dd1340dffdcf0bcd547ff149		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x7E7 40597 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36836
Obfuscation or payload: unlikely
embedded_file_obj0015.bin
78b09463af5cd373870eae2e3e83de87b7f6b659e0d0117ab4c09d90ebb2ad95		 pdf-embedded-file PDF EmbeddedFile object 15 at offset 0xA6C6 68 bytes

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