Malicious PDF — malware analysis report

Static analysis result for SHA-256 c225326e47a5a912…

MALICIOUS

PDF

68.2 KB Authoring application: Python PDF Library 055 http072057057pybrary056net057pyPdf057
MD5: 73f461afa5b303a0179b299e1a4ad651 SHA-1: 04bcd4f46876009ca5737f16e398bddee42347bb SHA-256: c225326e47a5a912236c04841e94e1cef3be0d5cb459ff869c8c43cd01db840e
184 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF file contains embedded JavaScript with eval() and unescape() calls, indicating obfuscated code execution. The ClamAV detection 'Pdf.Exploit.Agent-3853' and the presence of a suspicious JavaScript file suggest exploitation of a PDF vulnerability. The external URI 'http://www.intljobconnect.com/' is likely used to download a secondary payload. The document body is heavily obfuscated and does not provide clear user-facing content.

Heuristics 7

  • ClamAV: Pdf.Exploit.Agent-3853 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-3853
  • 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)
  • Suspicious extracted artifact medium 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.
  • 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.
  • External URI low PDF_URI
    PDF contains an external URL action

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0027_000.js
f4ed9712324da03301f97519ac82ead7c19c49ade1cb930683cbd555359f72e7		 pdf-javascript-stream PDF /JS object 27 at offset 0xEBF4 74527 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long hex-escaped blob(s).
font_00_sfnt_off00004d3c.bin
cc7cde7d1b4ea1d37a1620f11c4d0c92201b98096a7f27ec80fe9eeae0dba495		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D3C 28956 bytes
font_01_sfnt_off0000a0f9.bin
b3a4887207bddc29f1a8ae8f8dc634b572ce9e4caf5ba6b3692454751b020519		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0F9 1164 bytes
font_02_sfnt_off0000a6e8.bin
3ac2c91288cd14b0240cb4d23bedafef00078590f4038447f675a02bda596ae6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6E8 20176 bytes

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