PDF malware analysis — malicious · feedb6354636df90

MALICIOUS

PDF

3.0 KB

MD5: 492a202db2954f12ebb0272549da5780 SHA-1: 6873f26d85b82eb344ec2c7569bc5432a0b56b48 SHA-256: feedb6354636df908e5bc0596fd5ab3db2d8556fb9e17bd9f4edcb39d45d8839

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF contains embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream includes an eval() call and uses String.fromCharCode, suggesting obfuscation. The primary function of the script appears to be downloading and executing a second-stage payload, as evidenced by the obfuscated code within the embedded javascript_obj0007_000.js file. The extracted artifact 'javascript_obj0007_000.js' is also listed as a suspicious extracted artifact.

Heuristics 5

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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.
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `68f3fcf298b088ff4778c2713b7ddf2387f0f71c7d1df76c276a6c9636a08a4d`	pdf-javascript-stream	PDF /JS object 7 at offset 0x2A5	2058 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 base64-like blob(s).

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