PDF malware analysis — malicious · ed997aabe581ed8f

MALICIOUS

PDF

75.7 KB Created: 2010-03-15 15:18:29 Authoring application: OZVUYssVKMk (via FBUDtIs0F9)

MD5: d38b88237416ced546a8fb840f88eaf3 SHA-1: f4943e691051e82b2a7ff7dc0b62ff80f999b151 SHA-256: ed997aabe581ed8f84c69f9ddb02b8a581d8beed400ca0baad2d973e72aa8ed9

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream is heavily obfuscated, utilizing `String.fromCharCode` and `eval()` calls, which are flagged by PDF_FROMCHARCODE and PDF_EVAL respectively. This obfuscation suggests an attempt to hide malicious code, likely for downloading and executing a second-stage payload. The extracted artifact `javascript_obj0007_000.js` is also suspicious.

Heuristics 5

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.
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.
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_obj0007_000.js` `350d4fb7b35c03f02f2bb76292a741471c008e9dfecbcc6d52f9763dff5cdf3f`	pdf-javascript-stream	PDF /JS object 7 at offset 0x23B	76280 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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