Malicious PDF — malware analysis report

Static analysis result for SHA-256 c71ee3de572c6089…

MALICIOUS

PDF

6.2 KB
MD5: 5fc5d17c2052d325cc4d447246ccaac4 SHA-1: 08584cbd2cb65fd310a1beeacaecaf8ecc8cc639 SHA-256: c71ee3de572c608947a6a450800c93a2b43d7324683dad55f4514d370f7fb697
98 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. The presence of PDF_EVAL and PDF_UNESCAPE suggests the script is obfuscated and uses potentially dangerous functions to execute code. This script is likely designed to download and execute a second-stage payload. No specific malware family could be identified.

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. (matched inside decoded stream)
  • 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. (matched inside decoded stream)
  • 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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00000324.js
a2601756fa568aa4e2d3d18ed5532a49b5c5e1f191167d45494d18b8ef73e568		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x324 262 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s).
objstm_0024_00.bin
4962c988cf14045b4652cb6837a4024c79a485ecdc50035137deb20701054d33		 pdf-objstm-decoded PDF /ObjStm 24 0 obj (inflated) 331 bytes

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