PDF malware analysis — malicious · 9094959264858ac1

MALICIOUS

PDF

118.6 KB

MD5: ab55b480a033e74bbddebbc94577fbd9 SHA-1: a974dcbb4412949cd7efdaf36c8cf6669c97103e SHA-256: 9094959264858ac1ae7509e63e3fe624c300a5f9d515e4fa018c32372a1f314f

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains obfuscated JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT', 'PDF_JS', 'PDF_EVAL', and 'PDF_FROMCHARCODE'. A critical heuristic 'CLAMAV_DETECTION' identified the file as 'Pdf.Exploit.Agent-36086'. The presence of 'Large comment-padded JavaScript eval stager' suggests a stager mechanism designed to download and execute further malicious content. The document body was unreadable, but the script-related heuristics strongly indicate a malicious exploit delivery.

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` `7a7f0a949c1a79449f5b55b908bfb5a6869bfb75d674306f73b68af5f0080568`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	627307 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).
`legacy_pdfkit_stage_000.js` `7ba6822fa7291902a5edfbe90d8daab8730cfc1b82f579bca0e99bdf1ff8e908`	deobfuscated-js	double percent-decoded annotation JavaScript at offset 0x143	262144 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 624 long base64-like blob(s).

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