PDF malware analysis — malicious · cfcb7085a9217a5a

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: 6140ae3248c8ad09c68983203c3702c7 SHA-1: 475e9df320aa04640b23fa6df96ff9339d266dfd SHA-256: cfcb7085a9217a5ae037c9f2cc3c5d23ec93e3f3b14bf9113e4d3f88435ae304

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 presence of a PDF_EVAL heuristic firing suggests that the JavaScript code is obfuscated and uses an eval() call, which is commonly used to download and execute additional malicious content. The extracted artifact 'javascript_obj0013_001.js' further supports the presence of JavaScript. The obfuscated nature of the script and the use of eval() make it difficult to determine the exact payload, but the overall pattern points to a downloader.

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` `c3b5bd8b123669420289f0dbced0ca47a3ba4cabdefc0e69184db27f7bc473fd`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D2	12701 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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