Malicious PDF — malware analysis report

Static analysis result for SHA-256 1682d136724d92de…

MALICIOUS

PDF

19.8 KB Created: 2010-08-29 16:19:36 Authoring application: styeZek colSnap
MD5: 792df0c7279b409f24f0383214b1f327 SHA-1: 04ef3a7463ee1d8eae91a8796df843aea7f41707 SHA-256: 1682d136724d92de61ec5207a19e89c1f72cf8c0b7946749ef79743b01d16944
198 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF sample contains high-severity heuristics indicating an XFA form with executable script and an eval() call, strongly suggesting exploitation for client execution. ClamAV detection as 'Pdf.Exploit.Dropped-81' further confirms its malicious nature. The presence of embedded files and script obfuscation indicators points to a downloader or dropper functionality, likely executing a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 8

  • 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
  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution
  • 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 low 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.
  • 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 8

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
04462f810d6eacdacecc9d0a5f3f81bebc722af4415e04da19b520338f642b51		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xE2 67 bytes
embedded_file_obj0009.bin
5cb0e238a906a6f038fe6a09a1aa08d29fa882199b27078fee149ee8b96afdb7		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x175 811 bytes
embedded_file_obj0010.bin
d91d7c049bd139d8c8cc50ff8d75806b4d7dab4af80d097b05640c0f5772b154		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x4F3 107 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).
embedded_file_obj0011.bin
ca64315691c6183d3eec8096eedb06f062bebdf4aac923e0bf399ddd1c03f2de		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x5B1 17086 bytes
embedded_file_obj0012.bin
aa13f94903b9411b0745a7850380eae1d1f8063d9f241504a1140830ea42c583		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x48C2 345 bytes
embedded_file_obj0014.bin
7f09c77e8af0a1ca3a55a0cf82ebe0a70dd7ba857eaa972f513e2aea5779f4cd		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x4A6C 165 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).
embedded_file_obj0015.bin
5af31928fc1374f251c9a7b9fb4809bc7d91e00aab593755dd5f17f109f8c150		 pdf-embedded-file PDF EmbeddedFile object 15 at offset 0x4B5D 79 bytes
embedded_file_obj0016.bin
8b10b409977060fa6c96ad063e62a3e5035683f307276191e7c8b2493368a4a0		 pdf-embedded-file PDF EmbeddedFile object 16 at offset 0x4BF8 72 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.