PDF malware analysis — malicious · a72c81000157670a

MALICIOUS

PDF

4.9 KB Created: 2010-07-30 08:34:51 Authoring application: Qoperohaxomauecoviy (via 8b6cfRiniuaruijoxe)

MD5: 0fe029c2d963f3b75217b46111a198c9 SHA-1: f0ed6da77775c1cdf738408fa152fb18d6aeb114 SHA-256: a72c81000157670abc37e0f16e3a5df6cff339d31d928979aac8f664998db15f

98 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF 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_obj0011_000.js', is likely responsible for downloading and executing a second-stage payload. The obfuscation and stager pattern suggest a downloader functionality.

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_obj0011_000.js` `102bd53c3d5aca19d3fddf2959dd86439856f01b130576912f06ee24f2e34ef8`	pdf-javascript-stream	PDF /JS object 11 at offset 0xE66	487 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.