PDF malware analysis — malicious · ba7c70f35f2dbfb4

MALICIOUS

PDF

4.7 KB Created: 2010-07-04 16:38:08 Authoring application: Seroxera vawatwotazua (via 1191cBquefiwohali)

MD5: 7fe7b61b2f1cfc4e1c385ce514245cf4 SHA-1: 34bb8ea6993ae558b08400326b5b6f93193e6342 SHA-256: ba7c70f35f2dbfb425fa0572da166dd1874b19563c87ca5cb04a1bba5e077930

98 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains obfuscated JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, PDF_EVAL, and PDF_PAGE_WORD_XOR_EVAL_STAGER. The embedded JavaScript stream, named 'javascript_obj0010_000.js', is likely responsible for downloading and executing a second-stage payload. The obfuscation and stager behavior suggest a malicious intent to compromise the user's system.

Heuristics 5

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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_obj0010_000.js` `0b2ec58e1de7f8c84ac4e77cc2f2caa720a1d2c9c165a55d526eedf423a1a701`	pdf-javascript-stream	PDF /JS object 10 at offset 0xDD6	494 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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