Malicious PDF — malware analysis report

Static analysis result for SHA-256 31da7ea4e37303ce…

MALICIOUS

PDF

70.5 KB Created: 2010-08-29 16:19:36 Authoring application: styeZek colSnap
MD5: 6f83f0767ac3dc6543d4727186b27631 SHA-1: 1c31f25e956b1f2cd223468fc0c4c6fbe6a81160 SHA-256: 31da7ea4e37303ce2bdc2e914ae735c2bedbf44f1b682066cee780825c018097
178 Risk Score

Malware Insights

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

This PDF document contains embedded executable scripts within its XFA forms, as indicated by the PDF_XFA_SCRIPT and PDF_EMBEDDED_SCRIPT_PAYLOAD heuristics. The PDF_EVAL heuristic further suggests the execution of JavaScript code. The ClamAV detection of 'Pdf.Exploit.Dropped-81' strongly points to a known exploit. The embedded file artifact, specifically 'embedded_file_obj0010.bin', is flagged as suspicious and likely contains the secondary payload. The overall attack pattern involves leveraging these embedded scripts to compromise the user's system, likely by downloading and executing additional malware.

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
0daf333234b77c81f41e69f690cf08f48298b27142f8f6fef5701b67f5fb50af		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x4DC 101 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).
embedded_file_obj0011.bin
5a4c9975da1ad71623481cf6132facd0eecbc02baef3f351326118c0a988a1d0		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x58C 69178 bytes
embedded_file_obj0012.bin
6dfc2cfc739bf5cd5514e048143c782a1af7b4c86ed10bd88203471efa9b3fe7		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x11411 389 bytes
embedded_file_obj0014.bin
9f69c42e66b0c1666412737dc9cf4aa42379ee793c4ad8d07130781756ea33d5		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x115E3 65 bytes
embedded_file_obj0015.bin
51d6d76eddb1746e412f89f4d1c1b0d620c60fb4a5641c018e93871be63968a9		 pdf-embedded-file PDF EmbeddedFile object 15 at offset 0x1166E 147 bytes

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