PDF malware analysis — malicious · c6d208621d7aa75e

MALICIOUS

PDF

10.9 KB Authoring application: .a

MD5: 87052a3941969866323cbeb3632c6e3f SHA-1: 247267b47851bfeb13d965e65e78291094a7714c SHA-256: c6d208621d7aa75e5cdb508af1cc89deb28cb90e48ec84eae85da4a19e3671cd

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, and PDF_UNESCAPE. The extracted JavaScript file, 'javascript_obj0018_000.js', is heavily obfuscated, suggesting it is designed to download and execute a second-stage payload. The presence of 'unescape()' and 'String.fromCharCode()' further supports the obfuscation technique used to hide malicious code. The document body contains fragmented and nonsensical text, providing no clear lure.

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` `8cf8bfc68f9247d3f78027db80dbdbf54a37d26536fe2d989e4f98528673fa94`	pdf-javascript-stream	PDF /JS object 18 at offset 0x4BA	163343 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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