Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ed2af4a1b6c5d8e…

MALICIOUS

PDF

67.1 KB
MD5: 9d952d5084c400009026635d4fca8197 SHA-1: 928a21b313823beacd4c5a8e0b8d655a86c95f34 SHA-256: 7ed2af4a1b6c5d8e345511fcfbf9167e61a17bafe519f163301aa01f5e27afd8
218 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. High-severity heuristics like PDF_EVAL and PDF_UNESCAPE suggest the JavaScript is obfuscated and intended for exploitation. ClamAV detection as 'Pdf.Exploit.Agent-35646' further confirms its malicious nature. The embedded JavaScript likely downloads and executes a second-stage payload, a common technique for PDF-based malware delivery.

Heuristics 8

  • ClamAV: Pdf.Exploit.Agent-35646 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-35646
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • 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_off00000329.js
534dc0a126c33716572f5ebbc49400f88868b7f4a7cdf19ddbae9b5a3f1ad42e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x329 5768 bytes
Detection
ClamAV: Pdf.Exploit.Agent-35646
Obfuscation or payload: likely
Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
objstm_0024_00.bin
7e2c4568497ea4d54ec7309c479a9bb3c85e020fcf4ca1ae9a71d9b6813625c8		 pdf-objstm-decoded PDF /ObjStm 24 0 obj (inflated) 332 bytes

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