PDF malware analysis — malicious · bb7d29ec4068bef7

MALICIOUS

PDF

50.1 KB Created: EhoqXt8rPpQfe43kWj1dCHSaZY0wRVuIcD9Bx6s5Ai2%TM7nzlKvLGNygJObFmU Authoring application: Creator

MD5: b8dca25d688004e74e6e8bb122dde676 SHA-1: 3f4be0082ff1b70531737ea2e5fb51b1fc9d2043 SHA-256: bb7d29ec4068bef7d98036967543c5e609772cca8cfbe29c50fc9d0ec573df17

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The unescape() function is used, a common technique for obfuscating malicious JavaScript. The ML classifier strongly flags this PDF as malicious. The embedded JavaScript file, javascript_obj0018_000.js, is the primary artifact, likely containing code to download and execute further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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.
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_obj0018_000.js` `346191ffb0423ae4938951b07bc582952f51307e0eab605fbead5fbfa2664c98`	pdf-javascript-stream	PDF /JS object 18 at offset 0x4BA	25071 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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