PDF malware analysis — malicious · c9d6bfdb8b442ac2

MALICIOUS

PDF

4.0 KB

MD5: 550753d55b01ecb5f2cb69195a6ed5a2 SHA-1: 5834bab3f72ed6db50fb2d8a2bc69d34765ee64a SHA-256: c9d6bfdb8b442ac2ad9403014946b692cb781597003bf1eb162f6d6728243926

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1027 Obfuscated Files or Information

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The extracted JavaScript streams, particularly 'acroform_b64_00.js', show signs of obfuscation and utilize eval() and String.fromCharCode, suggesting an attempt to hide malicious code. This obfuscated script is likely designed to download and execute a secondary payload, a common technique for initial access.

Heuristics 5

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape 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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `a48ae7fb1f53bee7c8161fa9577e663f52daf0d4471662e180000c1e5d3d5a9c`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6277 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`acroform_b64_00.js` `bbdcaa6b148b5ccf1f168f7d5dd6fd836a97536e01cd45566787177c9b4adf88`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3555 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 8 long base64-like blob(s).

Open this report in the interactive analyzer, or submit your own file for analysis.