PDF / .TXT malware analysis — malicious · 41ded3c43c31334b

MALICIOUS

PDF / .TXT

4.0 KB

MD5: 7c6b16170124f5fd211f3637108c690b SHA-1: 57881be4e47b5271d4174d53f0711fa4c44cc862 SHA-256: 41ded3c43c31334b7116c328e26cbc09371b857ccbb79c5ebe54bfeac2da2626

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The 'eval()' call and 'String.fromCharCode' usage within the decoded stream suggest obfuscation and dynamic code execution. The extracted JavaScript files, 'acroform_b64_00.js' and 'javascript_obj0013_001.js', are likely responsible for executing the malicious payload. The obfuscation makes it difficult to determine the exact second-stage actions, but the presence of these techniques points to a common delivery method for malware.

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` `d22e6e7f6af5d59435c85e8eeb6a929be1daa775ebe10032706de7f3ad0ec7dd`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6329 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` `d0f62b03d7892e255901ae88538171d800e41711cc0e0328dd83817e54160934`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3594 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.