PDF malware analysis — malicious · 209e2dbc325ba291

MALICIOUS

PDF

4.1 KB

MD5: 2258e031adbec30ab270758c4e436cbd SHA-1: 33e251ab03c5ba4456da1af58d3cec47c187576b SHA-256: 209e2dbc325ba2917c8590471e64acef28aa9f27586e18b514e2def0526f2dce

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, including calls to eval() and String.fromCharCode(), indicating obfuscated code execution. ClamAV detected this as Pdf.Exploit.Agent-16526, a known exploit. The embedded JavaScript likely attempts to download and execute a second-stage payload, a common technique for exploiting PDF vulnerabilities.

Heuristics 6

ClamAV: Pdf.Exploit.Agent-16526 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-16526
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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_obj0013_001.js` `00f8f582639e21dfb40af69f7ab6fb7e8f5b3f581e4bb30da99e32912b2531df`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6345 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`acroform_b64_00.js` `81a3b4f729b472884e048a3ec42da233e5314898ffb007ec231642cf65e57f98`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3605 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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