PDF malware analysis — malicious · d80e4300b88057b0

MALICIOUS

PDF

4.2 KB Created: 2008-31-20 53:85:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 76ec24b85d2ed3a092888a16706b9cb1 SHA-1: fd034b317b3594225290cddceb65cee6cac5b941 SHA-256: d80e4300b88057b0b506e68bc12ea15605fee7dca1e04e9793a6fa13e08f4fc2

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 PDF_EVAL and PDF_FROMCHARCODE firings, along with the 'Script obfuscation indicators' from static triage, suggest the JavaScript is heavily obfuscated and likely performs malicious actions such as downloading and executing a second-stage payload. The presence of a large embedded JavaScript file (javascript_obj0013_001.js) further supports this. The exact intent of the script is difficult to determine due to obfuscation, but its presence in a malicious PDF points to a downloader or dropper functionality.

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. (matched inside decoded stream)
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_obj0013_001.js` `9b3423be39be9de793373928347ec2eef3b79388579ef61a54fbfabc34cbf61c`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D2	12923 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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