PDF / .TXT malware analysis — malicious · b8d3687e97e795a5

MALICIOUS

PDF / .TXT

9.7 KB Created: 2009-02-19 14:45:49 -02:00 Authoring application: Writer (via OpenOffice.org 3.0)

MD5: 612e27b75ef08fe76cafb8bac6d913e3 SHA-1: 6cbf5d68a4c12d559117fed1e696cbd9881cf03f SHA-256: b8d3687e97e795a57ee76f010893cccfc5a449341eb197587588dc5006dc9084

98 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The PDF_LAUNCH heuristic suggests an attempt to execute an external action, and the PDF_EVAL heuristic points to the use of eval() for obfuscation or dynamic code execution. The embedded JavaScript file, 'javascript_obj0027_000.js', is likely responsible for downloading and executing a second-stage payload, as suggested by the heuristic 'Suspicious extracted artifact — Signals: Script obfuscation indicators'. The document body is unreadable, so the primary indicators are the script execution and obfuscation.

Heuristics 5

Launch action high PDF_LAUNCH

PDF contains a /Launch action with an unresolved or extension-less target — treat as potentially dangerous
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.
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0027_000.js` `90b63a2244a61b47ff435c1fc3318d41d056b271c74a483415f620e8b2488a37`	pdf-javascript-stream	PDF /JS object 27 at offset 0x1C1B	3307 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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