PDF malware analysis — malicious · eddb0cc5a6b3bf43

MALICIOUS

PDF

15.7 KB

MD5: 3a6eae01119eeb7f51e9d0ee31f58647 SHA-1: 0cd2c3bf07566314d046c91b6ff540225d2bbd2a SHA-256: eddb0cc5a6b3bf43ec1e7ab5daed5de309aea7f6e487e9330f3744790ab96d49

166 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded JavaScript, including a large, obfuscated stager that utilizes eval() and String.fromCharCode(). This script is designed to execute arbitrary code, as indicated by the ClamAV detection of 'Pdf.Exploit.Agent-36086'. The primary function appears to be downloading and executing a secondary payload, which is a common technique for initial access and further system compromise.

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` `11883e6197b95c43d270e65531782e3bbd191387cada66b97bb0ac270ef2765b`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	425976 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` `e6cffeb2e923d50da0743a32f044ab387e9bd04a9ea532b98beecb530dff6ca4`	deobfuscated-js	double percent-decoded annotation JavaScript at offset 0x143	262144 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 718 long base64-like blob(s).

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