PDF malware analysis — malicious · f1dd370b3574658a

MALICIOUS

PDF

9.7 KB Created: 2009-05-12 06:58:43 Authoring application: eCIJAKu (via Del1VZ)

MD5: e28abb5c411e4070bddda73503d8884f SHA-1: c2affa4d941548bad09aca76450d7f2b1bdd2cb4 SHA-256: f1dd370b3574658a53cb7ef592ca4e5992a5cc0e5fe43ed12423b204cf9674ff

90 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. A high-confidence heuristic, PDF_EVAL, specifically flags the use of eval() within the JavaScript, which is a common technique for obfuscating malicious code. The ML classifier also strongly flags this PDF as malicious. The JavaScript is likely used to download and execute a second-stage payload, contributing to the overall malicious nature of the document.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.
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_obj0007_000.js` `2a997c01727bf4a54fd3ec3601af3a5f597346a0e14d48b42aebd188ee89786a`	pdf-javascript-stream	PDF /JS object 7 at offset 0x23E	8300 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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