PDF malware analysis — malicious · f3dde16c10c5f421

MALICIOUS

PDF

628 B

MD5: 7354eec024e5444e0cf820930111fc0d SHA-1: 02cf31ec4b002b19a0e884e8fb3c2ab1f2d3b36d SHA-256: f3dde16c10c5f4215411c67f20fdf9eaf36f38f7cab65904325cd0e5f745e4be

98 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. This obfuscated script, named 'javascript_obj0009_000.js', is indicative of a downloader or dropper mechanism. The primary goal appears to be executing arbitrary code, likely to fetch and run a second-stage payload from a remote source. The high risk score and specific heuristic firings support this assessment.

Heuristics 5

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.
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_obj0009_000.js` `4f363a85d56f1a4ac73841245ba43e0997267f06361bab678b91dfdeaa7f3b50`	pdf-javascript-stream	PDF /JS object 9 at offset 0x1C7	49 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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