PDF malware analysis — malicious · a6466b0b26c96046

MALICIOUS

PDF

4.0 KB

MD5: 6bdd3333981ba649b74860c2643cfca3 SHA-1: 29ea5bac46b4c99fd4193dd484101dd7d92d957b SHA-256: a6466b0b26c960463d6a4ed2a9ab4cc4156f5c47dc0ac66313bbc0cae2788314

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of PDF_EVAL and PDF_FROMCHARCODE rules, along with the 'acroform_b64_00.js' and 'javascript_obj0013_001.js' extracted files, suggests that obfuscated JavaScript code is being executed. This script likely attempts to download and execute a secondary payload, a common technique for malware delivery.

Heuristics 5

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` `dca9ac4c9b27e8adf11edbf265448778aedc7db0a9b7b89e283c84cff51c0df3`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6261 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` `44d818660961234ac0e6911c5342d09208c93be28a1d2f6049bd25898d635136`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3542 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s).

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