PDF malware analysis — malicious · be369571f0d73a47

MALICIOUS

PDF

5.0 KB Created: 2010-08-01 07:24:31 Authoring application: Mawdokaz (via f8265Zefikepeziliyfi)

MD5: e8bcfe444cc4c0b572e0720d18b45835 SHA-1: d2da053a13b5f9825b2053613cc32404415b7ad0 SHA-256: be369571f0d73a479f269646fb8c6b02c4c3d19302f0ceed788d79b9f273ffd1

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript, flagged by multiple heuristics as a stager for executing code. The ML classifier strongly indicates maliciousness. The presence of a JavaScript object suggests an attempt to download and execute a second-stage payload. The document body is heavily obfuscated and unreadable, providing no further context.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

Page-word XOR JavaScript eval stager high PDF_PAGE_WORD_XOR_EVAL_STAGER

PDF JavaScript enumerates rendered page words with getPageNthWord/getPageNumWords, extracts encoded byte fragments, XOR-decodes the stage with char-code helpers, and evals the result. This is an old exploit-kit staging pattern and is not normal document JavaScript.
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.
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_obj0011_000.js` `9142a1300d6f6a99eb4af0ba56c49a0a38bebff77798d40227fa8d62d328d822`	pdf-javascript-stream	PDF /JS object 11 at offset 0xEDB	535 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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