Malicious PDF — malware analysis report

Static analysis result for SHA-256 b30cfa3ebf622ace…

MALICIOUS

PDF

7.1 KB
MD5: 05dab23de8cb5759e6473f8cd6160cc0 SHA-1: d9916231ba3e2f4f9fd167c3519d25fda1fe418a SHA-256: b30cfa3ebf622acea565b124e1c73ffd89d5fa084d4fb7f5024d44a680ce237b
118 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/JScript T1559.001 Component Object Model Hijacking

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The presence of an unescape() call and a critical ClamAV detection (Pdf.Exploit.Agent-13547) strongly suggests exploitation of a PDF vulnerability. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, though the exact mechanism is not fully discernible from the provided data.

Heuristics 6

  • ClamAV: Pdf.Exploit.Agent-13547 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-13547
  • 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_off00000327.bin
bddd29046beccfda393f14a05b0fcd6d4f7edafc816b11521966dc7fdb9b3405		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x327 2972 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
stream_003_off00000847.bin
ce8479a840d0f8350a720038040e278d40f47535890e70d8011672b1b32a8e6f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x847 442 bytes

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