PDF malware analysis — malicious · 92c8adc7d96b39dd

MALICIOUS

PDF

2.1 KB

MD5: bb0eedab7d0221b670766e55b3b9c860 SHA-1: 62b87e46e5be1fcb7a7116da561f99a7ad8cdd35 SHA-256: 92c8adc7d96b39ddaad3dd1acea909bd6cedd112fbfc078fb295ac55cb5ac7db

106 Risk Score

Malware Insights

MITRE ATT&CK

T1027 Obfuscated Files or Information

The PDF file contains embedded JavaScript, which is heavily obfuscated using eval() and unescape() calls, along with String.fromCharCode. This obfuscated JavaScript is likely responsible for downloading and executing a second-stage payload. The presence of these obfuscation techniques and the embedded JavaScript stream strongly indicate a malicious intent, likely for delivering further malware.

Heuristics 6

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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_obj111611_000.js` `9864171cc4152f5d3e5671809dd40cebe1cf9319d0b8bfb0abd003cff50482db`	pdf-javascript-stream	PDF /JS object 111611 at offset 0x764	332 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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