PDF malware analysis — malicious · 595cbdf855ac6e7f

MALICIOUS

PDF

4.0 KB

MD5: 8894ad2722f871b0f2aaf09686092e6d SHA-1: fd620ae5ea9394ac53bb34c2191a5dcfc5e2d710 SHA-256: 595cbdf855ac6e7f2b8f6375ad8d39bbd4770448e48d9123ce57536e3ba4f285

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, including calls to eval() and String.fromCharCode(), indicating obfuscated code execution. The ClamAV heuristic identifies it as 'Pdf.Dropper.Agent-7262945-0', suggesting its primary function is to drop and execute other malware. The presence of deobfuscated JavaScript files further supports the analysis that this PDF is designed to download and execute a second-stage payload.

Heuristics 6

ClamAV: Pdf.Dropper.Agent-7262945-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7262945-0
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` `df0def4018015006b1b4703ff5dbb63897492313944f1e36391e6d48af1a16e9`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6301 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` `b3c03a31b5caf5e4cd12563855665857da6ebf6e729f36261ddfcb6f8fc2687f`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3573 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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