PDF malware analysis — malicious · 34be763412c7119c

MALICIOUS

PDF

11.0 KB Authoring application: Picked them over what he youll have fingered them and move.

MD5: 5fc562054311f8b6bc827b39cdb10f0c SHA-1: 739faeae9071a10975f7b84c0b7c40fb281ca0fe SHA-256: 34be763412c7119c9e764b3819097b0f9a0c9a9f422eb4e2c80203e9ddfd8b8a

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1027 Obfuscated Files or Information

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream is heavily obfuscated, utilizing unescape() and String.fromCharCode() functions, as evidenced by the PDF_UNESCAPE and PDF_FROMCHARCODE firings. This obfuscation suggests an attempt to hide malicious code, likely for downloading and executing a secondary payload. The extracted artifact 'javascript_obj0018_000.js' is also flagged for script obfuscation. The document body text appears to be unrelated filler content.

Heuristics 5

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.
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0018_000.js` `e4d2da1b494c486875361fd0cd8db205b27d00717330fa055fe2a429a29cd37a`	pdf-javascript-stream	PDF /JS object 18 at offset 0x4BA	162462 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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