PDF malware analysis — malicious · 3a922dcf09934174

MALICIOUS

PDF

4.0 KB

MD5: 1dc81bce3222049d42cf7e2fc477ecb9 SHA-1: 9e361a4de3ec0c7dac20da9d5841c7091fd00a9f SHA-256: 3a922dcf09934174df6f4bf3dd88a6831d26564afb2f48030914040502fed8e3

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The JavaScript stream exhibits obfuscation and uses eval() and String.fromCharCode(), suggesting it is designed to download and execute a secondary payload. The presence of deobfuscated JavaScript files like 'acroform_b64_00.js' further supports this. The exact nature of the payload could not be determined due to the obfuscation.

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` `cda2a485a5e4c708793766508b2dd185c5a80526043ff36c5400eac00ca3aac3`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6361 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` `8e3f11bd5b4aff22fae567d63c79641c9953927a5ce2dbb9b89c56f526a7fcdd`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3616 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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