Malicious PDF — malware analysis report

Static analysis result for SHA-256 73c97e52ba77320c…

MALICIOUS

PDF

43.1 KB Created: 2012-09-07 17:08:32 +04:00 Authoring application: Adobe Designer 7.0
MD5: 68791d7ded9e78be14654638b34a550f SHA-1: 5657f7d5beeca88714f88432c7dc69a19d18f698 SHA-256: 73c97e52ba77320c948885d8c8efaa99adc8936ade476a13b0d1fccae8fb4f6f
104 Risk Score

Malware Insights

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

This PDF document contains XFA forms with embedded JavaScript, a known technique for exploiting PDF vulnerabilities. The high ML classifier score and the presence of embedded scripts indicate malicious intent. The script likely downloads and executes a second-stage payload, although the exact URL is not directly extractable from the provided evidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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.
  • 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.
  • AcroForm button with action trigger low PDF_ACROFORM_BUTTON
    PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
  • 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://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xci/1.0/
    • http://www.xfa.org/schema/xfa-template/2.1/
    • http://www.xfa.org/schema/xfa-template/2.2/
    • http://www.xfa.org/schema/xfa-data/1.0/
    • http://www.xfa.org/schema/xfa-locale-set/2.1/
    • http://ns.adobe.com/xtd/

Extracted artifacts 8

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0042.bin
c06dcd026a7ea0536b63e07ce688691b585339a3ab7ff59065e546b56308c7bb		 pdf-embedded-file PDF EmbeddedFile object 42 at offset 0x743C 85 bytes
embedded_file_obj0043.bin
f20aceb8dbc16d07642c756ca1ccc141a87f1f44f1a99949a4c6a6a8678b4c98		 pdf-embedded-file PDF EmbeddedFile object 43 at offset 0x74EE 1526 bytes
embedded_file_obj0044.bin
f1bb90c6e0b69198f92bf1b9ed7719ef5a241c5de54f20dfbceb1263848e723e		 pdf-embedded-file PDF EmbeddedFile object 44 at offset 0x77BE 5830 bytes
embedded_file_obj0045.bin
3dd68f00f4fcb366a2a3a17c65cb2626eeddf5ea5713302d374310561d810169		 pdf-embedded-file PDF EmbeddedFile object 45 at offset 0x8468 144 bytes
embedded_file_obj0046.bin
851068169faaac8fcdfa72571a46fea924d1fb0c33b95225802028dfa0b1c7a7		 pdf-embedded-file PDF EmbeddedFile object 46 at offset 0x852B 4800 bytes
embedded_file_obj0047.bin
57045217c453d4674a08ad8778674bf199a7989a9505424a1815c016e6bb412f		 pdf-embedded-file PDF EmbeddedFile object 47 at offset 0x89C7 212 bytes
font_00_cff_off00001359.bin
23831e143e2e1a484b95ee765b15d94562c951468b895c080e655667dc04ddf0		 pdf-font-stream PDF embedded font (cff) at offset 0x1359 31178 bytes
font_01_cff_off00008b2c.bin
f4404c301719352ea06b16990294048ebdcb5d62780aa23be58d25b7eca261ee		 pdf-font-stream PDF embedded font (cff) at offset 0x8B2C 3589 bytes

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