Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfc6c93c64df718d…

MALICIOUS

PDF

14.6 KB Created: 2010-02-28 12:42:21 +03:00 Authoring application: Acrobat Editor 9.0 (via Adobe Acrobat 9.3.1)
MD5: cc330a89651ef51cd28f64014650e3e7 SHA-1: a500a28550d3a21288855e1429eef777a8a4bf6d SHA-256: bfc6c93c64df718d82be610e013856af8d4d30b83a469aec9819e58d52b10a1f
98 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1027 Obfuscated Files or Information

The PDF contains embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. The script utilizes eval() and unescape() functions, suggesting obfuscation and potential execution of malicious code. The presence of these functions and the extracted JavaScript file (javascript_obj0046_000.js) strongly suggest an attempt to exploit a PDF vulnerability for code execution. The exact payload or intent is unclear due to obfuscation, but the techniques used are indicative of a malicious downloader or exploit.

Heuristics 6

  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
  • unescape() call high PDF_UNESCAPE
    unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/AcrobatAdhocWorkflow/1.0/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0046_000.js
2c7f51751f233d99f2d8c98e0d503132fea5dedeca79550355c6b0a81b0d5748		 pdf-javascript-stream PDF /JS object 46 at offset 0x3737 35 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).
stream_009_off00002f4e.bin
9c8049ea10252e425d7090bf5e998f158a8cf977351cde4d5bc7e4b6fa1b5973		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F4E 1953 bytes

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