Malicious PDF — malware analysis report

Static analysis result for SHA-256 a08de196fd25b2fe…

MALICIOUS

PDF

71.1 KB Created: 2010-08-29 16:19:36 Authoring application: styeZek colSnap
MD5: a54a356f28e934f9ee4fadd4ca447a25 SHA-1: f7aa2a35e4a4a53b2906a5876ab5e399bba3028f SHA-256: a08de196fd25b2fe9007617b72c336868f9656e7e577c489bacf68a6042cbd83
208 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV with the signature Pdf.Exploit.Dropped-81. High severity heuristics indicate the presence of eval() calls and risky executable scripts within an XFA form, suggesting an attempt to execute embedded code. The ML classifier also strongly indicated maliciousness. The file contains multiple embedded binary artifacts, one of which was flagged for suspicious script obfuscation, indicating it likely serves as a payload dropper.

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 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
04462f810d6eacdacecc9d0a5f3f81bebc722af4415e04da19b520338f642b51		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xD7 67 bytes
embedded_file_obj0009.bin
10524c8841105d398f3e8e8c790bc322eaa76a0f71d67929337ac5d9e1752e52		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x162 815 bytes
embedded_file_obj0010.bin
73ec5073804e2a11b9b416ec3d0b60ddf3db9ee1c7dbbd9d2aa922ca62c8163d		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x4DC 80 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).
embedded_file_obj0011.bin
5e23a75c3da939ebd87a5c1a91edfe30aeb82f0948edbab91a5eea271e210828		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x577 69757 bytes
embedded_file_obj0012.bin
6dfc2cfc739bf5cd5514e048143c782a1af7b4c86ed10bd88203471efa9b3fe7		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x1163F 389 bytes
embedded_file_obj0014.bin
9f69c42e66b0c1666412737dc9cf4aa42379ee793c4ad8d07130781756ea33d5		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x11811 65 bytes
embedded_file_obj0015.bin
51d6d76eddb1746e412f89f4d1c1b0d620c60fb4a5641c018e93871be63968a9		 pdf-embedded-file PDF EmbeddedFile object 15 at offset 0x1189C 147 bytes

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