Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e68df585cf7b6de…

MALICIOUS

PDF

108.5 KB Created: 2009-08-11 12:43:52 Authoring application: Scribus 1.3.3.13 (via Scribus PDF Library 1.3.3.13)
MD5: 50d9fe2ac331c4ca4692f84e76c95977 SHA-1: 4972d44e851a41460d047bc242287a925715abcf SHA-256: 4e68df585cf7b6de0f4a465cc81c1bf31ab383ee34a1d829f9a2c16c4d08d8ae
120 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The ClamAV detection of 'Pdf.Dropper.Agent-7212422-0' strongly suggests a dropper functionality. The presence of JavaScript streams, particularly the larger ones, points towards the execution of malicious code, likely to download and execute a secondary payload. The document body being image-only with no text operators further supports a lure rather than informational content.

Heuristics 6

  • ClamAV: Pdf.Dropper.Agent-7212422-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7212422-0
  • 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.
  • 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.
  • PDF paints image(s) but contains no text operators info PDF_IMAGE_ONLY_LURE
    PDF has 1 image XObject(s) and the content stream contains no text-emitting operators (BT/ET, Tj, TJ, ', ") in either raw bytes or decompressed streams — this is the screenshot-as-PDF pattern used to bypass text-based scanners and to deliver instructions purely through rendered pixels. It is informational unless paired with invisible links or risky URI context.
  • 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.

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0062_000.js
b36b10bd79139562b786e487afb98e3752d36dd3d19e03522c55cd1dc693e863		 pdf-javascript-stream PDF /JS object 62 at offset 0x12770 63809 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s).
javascript_obj0063_001.js
ad424eff154eb672ecd9c1dab68de998cbe59e4449259df643e25c5b2fc9f279		 pdf-javascript-stream PDF /JS object 63 at offset 0x18F17 16914 bytes
javascript_obj0064_002.js
e9db968699bff1a3c4c87934cbaeb938d489420dc651638445e6925b40bd93f3		 pdf-javascript-stream PDF /JS object 64 at offset 0x1A7EA 58 bytes
javascript_obj0065_003.js
8c87e35d0cb9d9e5f39f5fca17ea4c621156fba62f9efafbdf9e8c3b619aa478		 pdf-javascript-stream PDF /JS object 65 at offset 0x1A869 83 bytes

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