PDF malware analysis — malicious · 3ee9b24ff4c4e72a

MALICIOUS

PDF

118.5 KB

MD5: adb442783bae29f909a48aed9d2b9773 SHA-1: 7057eb04be6ec807809085df62694287e29f9237 SHA-256: 3ee9b24ff4c4e72a39096c0366726b3984eaf76070dfadd9c35ae99d2af81ac5

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript, including a large comment-padded eval stager, indicating an attempt to obfuscate malicious code execution. The presence of `eval()` and `String.fromCharCode` further suggests dynamic code generation and execution. ClamAV detection as 'Pdf.Exploit.Agent-36086' strongly suggests this PDF is designed to exploit vulnerabilities. The document body was unreadable, but the heuristics point to a JavaScript-based exploit.

Heuristics 7

ClamAV: Pdf.Exploit.Agent-36086 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36086
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
Large comment-padded JavaScript eval stager high PDF_JS_LARGE_COMMENT_PADDED_EVAL

PDF JavaScript contains a very large stream padded with long random-looking block comments around String.fromCharCode and eval. This is an exploit-kit obfuscation shape used to bury a decoder and recovered stage inside noise, not normal PDF form automation.
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `6ec4fc6926566f46f6f847a69ec309726e2c64075d3bd765e010f5b6fcdeb572`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	627488 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 42 long base64-like blob(s).
`stream_001_off0001d680.bin` `f19c4c5eef359f690c2324f0fa6b7741ef92849d0f2f1f11b4751a148e81b252`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1D680	300 bytes
`stream_002_off0001d833.bin` `10ca35e945ab3656720866521d43c131d728030ded1e9b93ce511d17ae2316a6`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1D833	200 bytes

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