Malicious PDF — malware analysis report

Static analysis result for SHA-256 bde390431adf01ad…

MALICIOUS

PDF

45.4 KB
MD5: 35fc2f308280eaf8a6289222756da2bc SHA-1: 326c2822adb286063442061cdde295ee23927126 SHA-256: bde390431adf01adeacd76e07bdfebe8421ea608abcf151eb8c0a4bd6348ecaf
66 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The PDF_UNESCAPE heuristic suggests obfuscation is being used within the script. The extracted artifact 'javascript_obj0012_000.js' is a strong indicator of malicious intent. The script's likely purpose is to download and execute a second-stage payload, which is a common technique for malware delivery. The presence of XFA forms (PDF_XFA) is less common but does not detract from the JavaScript-based threat.

Heuristics 6

  • unescape() call high PDF_UNESCAPE
    unescape() found — often used to decode shellcode in PDF JS exploits
  • 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.
  • 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/2.6/
    • http://www.xfa.org/schema/xfa-template/2.6/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0012_000.js
dd3c734fbf8b3ccc4d075012944632cee3ca3fcb2c8b993df34ddfef9d821354		 pdf-javascript-stream PDF /JS object 12 at offset 0xA0B2 4482 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
font_00_sfnt_off0000033c.bin
d6a43d21d5791b9e9b255fd6bedb6818546531ba03fa146ce7444e51deba41c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x33C 65932 bytes

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