PDF malware analysis — malicious · e7eda615beb1261b

MALICIOUS

PDF

15.7 KB

MD5: 651388b98f315c105c7013889b0a6850 SHA-1: a4623a2bb635e91ef0af320d67d5028a4ea6b8f6 SHA-256: e7eda615beb1261bf0d1dd7d9e2742dc01adb48661fe963a460d5a9a4e468187

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is identified as a malicious PDF by ClamAV (Pdf.Exploit.Agent-36086). Static analysis revealed embedded JavaScript with high-confidence heuristics for eval() calls and a large comment-padded JavaScript eval stager. These indicate the script is designed to deobfuscate and execute further malicious code, likely an exploit or downloader. No document body text was available for content-based analysis.

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` `103f8df1b6f341b0195cd67ea3924e47ebab6e5ae3932f7c4e4d31078e9872db`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	425272 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_off00003b6b.bin` `ab2499ad9980273224a257b5fbfff6948c49d7628f9102017f91928f7ec31ae4`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3B6B	300 bytes

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