PDF malware analysis — malicious · d2c6f7d082e2fd0b

MALICIOUS

PDF

15.7 KB

MD5: 1cdfffca15c05757e97254dca68112fe SHA-1: 473c7d16bb6cd4b9617b2c7b8fa2be5d74dd8358 SHA-256: d2c6f7d082e2fd0b4b7227c134d0563b36ae4217f458c52a9d4f96807da8edc1

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, including a large comment-padded eval stager, which is a common technique for obfuscating malicious code. The ClamAV detection 'Pdf.Exploit.Agent-36086' and the heuristic firings for PDF JavaScript and eval() calls strongly indicate that this PDF is designed to exploit vulnerabilities or deliver a secondary payload. The extracted JavaScript file, 'javascript_obj0006_000.js', is the primary artifact associated with this malicious behavior.

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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `e397573cee7635f30c5e14dd91e0f31ab96b8f4b5dfe148f7e1adff4dde89cf2`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	425640 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).

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