PDF malware analysis — malicious · 3e8da99560bf25ef

MALICIOUS

PDF

13.5 KB Created: e1svrt Authoring application: Adsfgddfobe (via sfgasdfgsd)

MD5: 73d8ba018cee87a90463d885bcc65303 SHA-1: 5f50ab5c8f8a905e3cd68bcafaf44b5daf96451e SHA-256: 3e8da99560bf25efcb35bfedd9cdcc2deaf39a8ed9072a4bb518c56406f0b8f3

98 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript streams, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. The presence of PDF_EVAL and PDF_UNESCAPE firings suggests that the JavaScript is obfuscated and likely attempts to execute arbitrary code. The extracted JavaScript files, javascript_obj0015_000.js and javascript_obj0017_001.js, are suspicious artifacts. The obfuscated nature of the script prevents a definitive analysis of its exact payload, but the techniques used strongly indicate a downloader or dropper functionality.

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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0015_000.js` `9d70141af3a822acccc264ef07edff74fb35057902ba021de6dd368c8575e640`	pdf-javascript-stream	PDF /JS object 15 at offset 0x14F	251 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0017_001.js` `eb38f21f9bedfa692973d5040fa72403c33e1b7416e5315eba9178a06cc6f506`	pdf-javascript-stream	PDF /JS object 17 at offset 0x32B3	269 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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