PDF malware analysis — malicious · d866a585562ab0a5

MALICIOUS

PDF

9.7 KB Created: 2008-04-28 12:17:40 +03:00

MD5: 5b82cb9dff1d936af42469e284802f2c SHA-1: 68df55835a2cccd2d2c83fe459124e168ce6c9aa SHA-256: d866a585562ab0a5e38f0210fe5d7fe918c643b54a67a7e3d253e924039f201f

74 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF document contains embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. The PDF_EVAL and PDF_FROMCHARCODE firings suggest the JavaScript is obfuscated and likely attempts to execute arbitrary code. An embedded JavaScript file, 'javascript_obj0016_000.js', was extracted, further supporting the presence of malicious scripting. The exact payload and execution flow are not fully discernible due to obfuscation, but the overall pattern points to a PDF-based exploit delivering a secondary payload.

Heuristics 7

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.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
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.
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.w3.org/1999/02/22-rdf-syntax-ns#
- http://ns.adobe.com/iX/1.0/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0016_000.js` `4d9feefc699e1003cc665fd7d5873d93b80a479ad827800cbeda826300ae7b62`	pdf-javascript-stream	PDF /JS object 16 at offset 0x931	7824 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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