PDF malware analysis — malicious · 7cc4b873f70b5754

MALICIOUS

PDF

118.6 KB

MD5: b46e29d38cd3e23208e45d0f2f572980 SHA-1: 722d56c01c10a48537f88b5a32407e0760a83929 SHA-256: 7cc4b873f70b5754337e573375ce6e6805568390c01bc73dee8a708c3b26751f

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript, including a high-severity 'eval()' call and a 'Large comment-padded JavaScript eval stager'. ClamAV also detected this as 'Pdf.Exploit.Agent-36086'. The JavaScript is likely responsible for downloading and executing a second-stage payload, which is a common technique for delivering malware via malicious documents. The specific nature of the payload could not be determined due to obfuscation.

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` `1251eb76543e466ce854e3950c3ada8ac0c9d15cde432cd3d8c949f47775f4da`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	628527 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_off0001d6f5.bin` `b8391ccbf9f4f723fcd1f6ec469e78a5db956aed6bdb6458ac443fb5b1946dea`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1D6F5	300 bytes

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