PDF malware analysis — malicious · 5691b8baeeb83505

MALICIOUS

PDF

2.8 KB

MD5: 6b91323e43258185275c7bc989d44602 SHA-1: 79475fa3c135885b8900c60bdceb08f7018031a4 SHA-256: 5691b8baeeb83505e97ba279a174a2490a6d3559e68116b94a91b1f2223efa59

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, PDF_EVAL, and PDF_FROMCHARCODE. The presence of obfuscated JavaScript streams, specifically 'javascript_obj111611_000.js' and 'javascript_obj111612_001.js', suggests an attempt to hide malicious functionality. The eval() call and String.fromCharCode usage are common techniques for deobfuscating and executing arbitrary code. This pattern is consistent with a downloader or dropper that executes a second-stage payload.

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_obj111611_000.js` `88449bc71f74e8d677d49af4ef6dfec29112188695bbcf76e55f663c5ea68fad`	pdf-javascript-stream	PDF /JS object 111611 at offset 0x197	256 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj111612_001.js` `f89f971e2bc7cc59baaaac281a545c2d01e905b5699d16e92e95ce04d655743f`	pdf-javascript-stream	PDF /JS object 111612 at offset 0x266	3377 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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