Malicious PDF — malware analysis report

Static analysis result for SHA-256 689d7983fe095688…

MALICIOUS

PDF

134.8 KB Created: 2009-08-11 12:43:52 Authoring application: Scribus 1.3.3.13 (via Scribus PDF Library 1.3.3.13)
MD5: 7a406bf4d4313360d1d5c174227f6d53 SHA-1: f7e6bb144d185dcb081d6b6372300d8a7914d11d SHA-256: 689d7983fe0956882330fdd23d79e3b8d67e0c3ba7c82cf359513bf207cfb286
108 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript, flagged by multiple heuristics and identified by ClamAV as Pdf.Exploit.Agent-22710. The JavaScript appears to be heavily obfuscated but is designed to execute arbitrary code. The primary function of the script is to download and execute a second-stage payload, indicated by the concatenation of strings forming executable JavaScript code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9722

Heuristics 4

  • ClamAV: Pdf.Exploit.Agent-22710 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-22710
  • 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.

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0062_000.js
46690bdb1742eb1b704f6549801c0f7ca7b3100cf858229064e9e13eae1bd45d		 pdf-javascript-stream PDF /JS object 62 at offset 0x12770 117106 bytes
javascript_obj0063_001.js
72f1c14dcb18b5bfa71456eef391a2436e50d3e91e3b158cc4e0a297c1d51c46		 pdf-javascript-stream PDF /JS object 63 at offset 0x1E0B2 33989 bytes
javascript_obj0064_002.js
548bddefb5fe48a4de14b6a86623c6bd757d572ec344e9cdfccb7a61389a2f7a		 pdf-javascript-stream PDF /JS object 64 at offset 0x21160 53 bytes
javascript_obj0065_003.js
721fe9db20ad51b1c83eb5349e1772a5fdbb1dbd023551428baffe1e7bb4d500		 pdf-javascript-stream PDF /JS object 65 at offset 0x211E0 66 bytes

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