PDF malware analysis — malicious · eb86877043c47353

MALICIOUS

PDF

8.3 KB Created: 2009-12-17 16:59:10 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: bfd61650aa521ae94c40862ee7fbd153 SHA-1: 627944140f92024effa742f3e2bcabb45f872932 SHA-256: eb86877043c47353fab06c02eddfcbe061bb0e41151b71481352e425d4e97442

98 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that utilizes eval() and unescape() functions, indicating obfuscation. This JavaScript is likely designed to exploit a vulnerability within the PDF reader to execute arbitrary code. The presence of 'testjs' in the stream suggests a JavaScript execution attempt. The primary attack vector appears to be the execution of this obfuscated script, which is a common method for downloading and executing further malicious content.

Heuristics 5

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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.
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_obj0021_000.js` `21a684731b20c95fef939281c5d30fca8e2d34abe6a7d83831924f84f14d3bb3`	pdf-javascript-stream	PDF /JS object 21 at offset 0x1883	4992 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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