PDF malware analysis — malicious · cc8f832f260660ed

MALICIOUS

PDF

118.7 KB

MD5: 8f82910f0e8653140108bea8bdc753c9 SHA-1: 99cc8ce79e46883b0bc564b2cc6e72e166d9b3f7 SHA-256: cc8f832f260660ed5ee52551a5d1cdf0f6f1c58ac5a42cab341a5dd82976a9bf

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT', 'PDF_JS', and 'PDF_EVAL'. A critical ClamAV detection of 'Pdf.Exploit.Agent-36086' strongly suggests malicious intent. The presence of a large, comment-padded JavaScript eval stager points to an attempt to obfuscate a payload downloader. The document body is unreadable, but the technical indicators are sufficient to infer a malicious exploit delivery.

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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `6fb9b4e713b3e385132e8a47e451e5b44d2c96e54a80eb96ff9bec2d032046ef`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	627708 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_off0001d72a.bin` `6c76047ea05f2f6ef60b8c27afe206be0248dde52a5271887f7a5e36022af67a`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1D72A	300 bytes

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