PDF malware analysis — malicious · 3749060c88650bc7

MALICIOUS

PDF

4.0 KB

MD5: 47038b2ce2d31c113f4cecbe2391e9ba SHA-1: 321876c174ffa1fa3c50e90906f2b00e2fa7b224 SHA-256: 3749060c88650bc771f19894878a3abf81faeb7c3a12985618d448eab4cb6d87

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream exhibits obfuscation, including the use of eval() and String.fromCharCode(), as flagged by PDF_EVAL and PDF_FROMCHARCODE. The deobfuscated JavaScript artifact, 'acroform_b64_00.js', suggests the script's purpose is to download and execute a secondary payload. The presence of these obfuscated scripts and the high risk score point towards a malicious downloader.

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` `fb5d1e34c92c44810ca9477a00225c89331e3f66f6cf803f60aa361d9cc9623a`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6341 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` `8cc2815a52c9f71571c56fc48846307e48da31706e35c0170cf8909a466f4da1`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3603 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).

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