Malicious PDF — malware analysis report

Static analysis result for SHA-256 44f94de1d0c41840…

MALICIOUS

PDF

29.6 KB Created: 2010-08-29 16:19:36 Authoring application: RedYvicud WevekatygOkut
MD5: fc97e0e7d29ff5f58141838cee2affba SHA-1: 202329b49baa8290efe576e8c3c99e3bfcea828d SHA-256: 44f94de1d0c418404029523c3f5b83b69b62d6b1c442b856717264212854e7c7
208 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF contains high-severity heuristics indicating an embedded script payload and an XFA form with risky executable script. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded script is likely designed to download and execute a second-stage payload, as indicated by the 'Pdf.Exploit.Dropped-81' ClamAV detection name. No document body text was available for analysis, but the presence of embedded files and script execution points to a typical exploit delivery mechanism.

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 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 8

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
04462f810d6eacdacecc9d0a5f3f81bebc722af4415e04da19b520338f642b51		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0x1AB 67 bytes
embedded_file_obj0009.bin
6b2260d3c78649345d3f0b850b831d545d33bb7017ccdf438cdfe1e9db7f2db2		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x238 294 bytes
embedded_file_obj0010.bin
be64e13f511fca988a2e4f9fb3d03b0f62686275f7ea7cac603764fbc588d863		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x3A9 611 bytes
embedded_file_obj0011.bin
2baa3f52556a37508d23a29c2783729b1b46004925e2d26943c096d965ec41e5		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x657 26684 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).
embedded_file_obj0012.bin
103d1e7983cf88bfacedddb4af33ffb5317d9c2c8b3e1bfd987b2c5d712bc985		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x6EDE 323 bytes
embedded_file_obj0014.bin
dd7493dae56c73ee9ce77e26995efed844d7c1b0d117d1f9194ee808893db387		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x706B 208 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).
embedded_file_obj0015.bin
e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876		 pdf-embedded-file PDF EmbeddedFile object 15 at offset 0x7181 77 bytes
embedded_file_obj0016.bin
92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a		 pdf-embedded-file PDF EmbeddedFile object 16 at offset 0x7215 56 bytes

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