PDF malware analysis — malicious · d604bc47d8c6e865

MALICIOUS

PDF

118.7 KB

MD5: b2d4568a12d880115deaeb5f1a0c8f91 SHA-1: edfdf9d92252c3b15bd17939844a977550010f90 SHA-256: d604bc47d8c6e865142199c0beff3ebd27f7504cd71e0ce2670f344b3acc2b6d

166 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF contains embedded JavaScript with multiple high-severity heuristic firings, including `eval()` calls and a large comment-padded eval stager. ClamAV detected this file as 'Pdf.Exploit.Agent-36086', indicating it's a known exploit. The presence of JavaScript and exploit-related heuristics strongly suggests the PDF's purpose is to deliver a payload via an exploit, likely through user interaction such as clicking a link or opening the document.

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` `459a2df515a80e971f185bd88813a982e93723f2572e0c1551cdf03773fdba19`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	627216 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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