Malicious PDF — malware analysis report

Static analysis result for SHA-256 4582474c6f338b51…

MALICIOUS

PDF

299.7 KB
MD5: 133197961314f791c432c17c7001e4d0 SHA-1: 320227652021462eabe1a3bae714e5ba1e859052 SHA-256: 4582474c6f338b5191b7aefb8d6df6dbd2bb5ef7e1c3515581317a51436dba4d
106 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript and an embedded PE executable payload. The JavaScript is likely used to exploit a vulnerability within the PDF reader to decompress and execute the embedded payload. The presence of an embedded executable strongly suggests the document is a malicious dropper designed to download and run further malware.

Heuristics 7

  • Embedded Windows executable payload in PDF stream critical PDF_EMBEDDED_PE_PAYLOAD
    PDF stream bytes contain an embedded Windows executable with a verified PE header. Exploit chains often hide droppers inside ordinary streams rather than standard /EmbeddedFile attachments.
  • ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX
    Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
  • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0012_000.js
e6af96af0cad4fe39fc7128986ff07f04b2a42708ac85beed23a1e6abba6c814		 pdf-javascript-stream PDF /JS object 12 at offset 0x4A24D 3517 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).
stream_000_off00000337.bin
3d68b6c65f2aff682ee36830025e4b0bbc1d6190719567586d71e5b17223b3fc		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x337 525856 bytes
embedded_pdf_0002cd45.exe
134290aa3b149f9e74c1f654ec13eb88ed554418fb8a3698b7f05058966f4d61		 embedded-pe PDF decompressed stream PE payload at offset 0x2CD45 343058 bytes

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