PDF malware analysis — malicious · 98e764114c1ce6e0

MALICIOUS

PDF

2.0 KB Created: 2010-08-08 16:07:39 +04:00 Authoring application: PDFill: Free PDF Writer and Tools

MD5: 7a41a4d5f56b033adeb97209127b3e23 SHA-1: 6af3564379c01e1ffe74fd07e5377888fea85514 SHA-256: 98e764114c1ce6e05b3a1a7d7d34bcb8a3c255774788247fb4e4927cb0ca8426

60 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The JavaScript stream appears to be obfuscated, as suggested by the 'Script obfuscation indicators' finding. The primary purpose of the script is likely to download and execute a second-stage payload, although the exact mechanism is obscured. The presence of the unescape() function further supports the likelihood of malicious code execution.

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` `48296f0f33e327607e6f9d2626b4c1a31e5e90d9f798a9547874861a01428b2c`	pdf-javascript-stream	PDF /JS object 1 at offset 0xF	329 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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