PDF malware analysis — malicious · 4c6886bbae2b3e26

MALICIOUS

PDF

417.2 KB Created: 2010-01-30 13:13:01 Authoring application: Acrobat 编辑器 8.0 (via Adobe Acrobat 8.0)

MD5: 954b3b99ca414480d3a45225d5894184 SHA-1: ecdd11a62ef0b2015356071ee6bed3056dd18191 SHA-256: 4c6886bbae2b3e265e42e4babd7e10f4b1db8425bf091c4fce21947ec8e888a9

74 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of a PDF_EVAL heuristic firing suggests that the JavaScript is being used to execute arbitrary code, likely to download and run a second-stage payload. The extracted artifact 'javascript_obj0030_000.js' is also noted. No specific family could be identified, but the techniques used are common for initial access via malicious documents.

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/xap/1.0/
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/pdf/1.3/

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`PDF` `06e257095b5663de382e43f0a1bcc92337a1e5cbbcc8c5b977149b952e38fb69`	pdf-embedded-file	PDF EmbeddedFile object 6 at offset 0x105F	4788 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`javascript_obj0030_000.js` `648a6151c1e391feb35b8fe58daa975236dd53ba3085a78c3288fe2e61b650e7`	pdf-javascript-stream	PDF /JS object 30 at offset 0x5CB	60 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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