Malicious PDF — malware analysis report

Static analysis result for SHA-256 e72fe3b64974aaae…

MALICIOUS

PDF

17.6 KB Created: 2010-08-29 16:19:36 Authoring application: styeZek colSnap First seen: 2012-09-15
MD5: 2eca70b1cd99e07fe4a9328897e61409 SHA-1: f30c4ed33727187494474cbb9838ce9b701a7e82 SHA-256: e72fe3b64974aaaee4cce9911c24edda05b299e7c9ea3d0243d8b5aeafeb5947
170 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1059 Command and Scripting Interpreter

The PDF file contains embedded script payloads and triggers XFA form script execution, indicating it's designed to exploit vulnerabilities. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL, while benign, is part of the document's structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.Dropped-81 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-81
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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 script payload in PDF stream info 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 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/ In PDF document text
    • http://www.xfa.org/schema/xci/1.0/In PDF document text
    • http://www.xfa.org/schema/xfa-template/2.5/In PDF document text
    • http://ns.adobe.com/xtd/In PDF document text
    • http://www.xfa.org/schema/xfa-data/1.0/In PDF document text
    • http://ns.adobe.com/xfdf/In PDF document text
    • http://www.xfa.org/schema/xfa-form/2.8/In PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin pdf-embedded-file PDF EmbeddedFile object 8 at offset 0x13E 84 bytes
SHA-256: d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777
embedded_file_obj0009.bin pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x1ED 228 bytes
SHA-256: 24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0
embedded_file_obj0010.bin pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x2E0 1336 bytes
SHA-256: 12cb575aac7c72789d989e89a4c905498bb9760d391bf91074f019a69433414f
embedded_file_obj0011.bin pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x611 199 bytes
SHA-256: c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460
embedded_file_obj0012.bin pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x703 34181 bytes
SHA-256: 827f664f389e561aa9979ee1896b4835970f68eedada761c4764d129c6d51e61
embedded_file_obj0013.bin pdf-embedded-file PDF EmbeddedFile object 13 at offset 0x4195 77 bytes
SHA-256: e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876
embedded_file_obj0014.bin pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x423C 56 bytes
SHA-256: 92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a

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