PDF malware analysis — malicious · 8b1875263afb8fb0

MALICIOUS

PDF

2.0 KB Created: 2010-08-08 16:10:53 +04:00 Authoring application: PDFill: Free PDF Writer and Tools

MD5: 92b2ebddc9aa62cca52aa85a443ef6d5 SHA-1: bdd8ba5e78bb13ba928d762522805e9a742f5e5b SHA-256: 8b1875263afb8fb02a9e9cc9a74678861599650e824b2f64cc07ea6a01d6f911

60 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings. The JavaScript stream is obfuscated and uses an unescape() call, suggesting it's designed to hide malicious code. The primary intent appears to be the execution of this script, likely to download and execute a second-stage payload or perform other harmful actions. The presence of the PDFill branding might be a lure.

Heuristics 6

unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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.
External URI info PDF_URI

PDF contains an external URL action
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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://www.pdfill.com)/S/URI
- http://www.pdfill.com

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0001_000.js` `aae2d99229667cb9b0608d061d12bb2ddbbd6f35a2007e7d54547c41eebaf587`	pdf-javascript-stream	PDF /JS object 1 at offset 0xF	366 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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