Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c2b029ae5293fe3…

MALICIOUS

PDF

18.4 KB Created: 2010-08-29 16:19:36 Authoring application: styeZek colSnap
MD5: c7800ed0e40afb5b07ef0fec5e2e71b2 SHA-1: e260f87fba277e87fd978a5a5c6dc6a85f3d4c52 SHA-256: 6c2b029ae5293fe391dd8ec6ab85ed9ecf511cef054c767528de67bd9a50532e
198 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains XFA forms with executable JavaScript, a common technique for exploiting PDF vulnerabilities. Heuristics indicate the presence of embedded scripts and an embedded file payload, suggesting the document is designed to download and execute further malicious content. The ClamAV detection 'Pdf.Exploit.Dropped-81' further supports this assessment.

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 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
984a346671265f638e28c6f18a78a6dac023cc310f32d8ad0ab6a680d4c92579
pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x162 781 bytes
embedded_file_obj0010.bin
9e22ae248b84e1687a0129c0f1bf301d348d22522b1688ac09e97ea9d49f2f42
pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x4BA 144 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).
embedded_file_obj0011.bin
e202b069fa0b30bf310dcff43a8da2253d295ab2180665050155161a00ef53c7
pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x595 15850 bytes
embedded_file_obj0012.bin
6dfc2cfc739bf5cd5514e048143c782a1af7b4c86ed10bd88203471efa9b3fe7
pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x43CA 389 bytes
embedded_file_obj0014.bin
9f69c42e66b0c1666412737dc9cf4aa42379ee793c4ad8d07130781756ea33d5
pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x4599 65 bytes
embedded_file_obj0015.bin
129e4e726ddafc353e13bd03f15fd4d48ceb50aa28924bc8b406e3be1073b46a
pdf-embedded-file PDF EmbeddedFile object 15 at offset 0x4620 146 bytes