PDF malware analysis — malicious · e7a9094d1b51cb74

MALICIOUS

PDF

118.7 KB

MD5: 43e33d2732be07f36fa5d725cab520a2 SHA-1: 492de8735bcb8056ff0a2cacdba9c32eaceb6e4e SHA-256: e7a9094d1b51cb748766643fb42b1232fe786fa2a05074319817a99b300e3336

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains embedded JavaScript, including a large comment-padded eval stager, indicating an attempt to obfuscate malicious code execution. ClamAV detected this file as 'Pdf.Exploit.Agent-36086'. The presence of JavaScript and eval() calls strongly suggests the file is designed to exploit PDF vulnerabilities and execute arbitrary code, likely to download and run a second-stage payload.

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` `a9b3e893fdf185a727a7c2d682831541c86c2efe626545ba6ef83bbece65054c`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	626989 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_off0001d721.bin` `d3433eb7d77e9aa4a4cd1dd66fc0507c65a5ff00c54398586de8c8c1e97cb171`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1D721	300 bytes

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