Malicious PDF — malware analysis report

Static analysis result for SHA-256 a64f1db5feba8cdc…

MALICIOUS

PDF

67.7 KB Created: 2010-08-01 04:20:19 Authoring application: daceWis muleDoc
MD5: 405c82a1afa399978d19f8f2d269647f SHA-1: f23c3fd1dc695e5305dbd8f7e47620232bdf01ac SHA-256: a64f1db5feba8cdcc34ce651aa61b83a36e89ba9fbef8d20c1478803759a1d13
118 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains high-severity heuristics for PDF_EVAL and PDF_XFA_SCRIPT, indicating the presence of executable script within an XFA form. This script is likely designed to download and execute a secondary payload, as suggested by the embedded file artifact 'embedded_file_obj0010.bin'. The script's obfuscated nature and the embedded file point towards a malicious intent to compromise the user's system.

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.
  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution
  • 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
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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://ns.adobe.com/xtd/
    • 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
d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0x2A0A 84 bytes
embedded_file_obj0009.bin
24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x2AA8 228 bytes
embedded_file_obj0010.bin
36f0e86b011c1d5e85ca53c28304dfb385a5157ecf058c6a3f29ecf86c3628f4		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x2BD8 1091 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).
embedded_file_obj0011.bin
c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x3066 199 bytes
embedded_file_obj0012.bin
eddaeeb081641696ad850bf32e45e94c49d46efab0c580397a0298d15172f569		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x317A 54876 bytes
embedded_file_obj0013.bin
e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876		 pdf-embedded-file PDF EmbeddedFile object 13 at offset 0x10820 77 bytes
embedded_file_obj0014.bin
92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x108B7 56 bytes

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