PDF malware analysis — malicious · bc74a176ed741898

MALICIOUS

PDF

118.7 KB

MD5: 80923a95804ec4f7d2982aa2ee4491c5 SHA-1: 7a3bf8566a3b7750fc7d9ac7e18a0aae87dc62a2 SHA-256: bc74a176ed7418983bf48d63fdfe5c23edbada3372dcfe37e855d60b7861f778

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF contains embedded JavaScript, including a large comment-padded eval stager. This JavaScript is heavily obfuscated and uses String.fromCharCode, indicating an attempt to hide malicious code. The ClamAV detection 'Pdf.Exploit.Agent-36086' strongly suggests this PDF is designed to exploit vulnerabilities and likely download further malicious content. The primary intent appears to be the execution of obfuscated JavaScript, which is a common technique for delivering second-stage malware.

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` `12e68da1e585957d0d3737ee5ae609feb16edb98a53c53f69623d6da928fe6d4`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	626747 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).

Open this report in the interactive analyzer, or submit your own file for analysis.