PDF malware analysis — malicious · 5434abe05a5ae111

MALICIOUS

PDF

79.2 KB Created: 2009-08-25 16:07:23 Authoring application: Scribus 1.3.3.13 (via Scribus PDF Library 1.3.3.13)

MD5: dab9e53637be7536bda69e150ec608d8 SHA-1: c9d27b43899aa6aa6c81ee544209fc25cb10b98f SHA-256: 5434abe05a5ae1114754176e7297839e96d2b9ebe8082e28c31a3d2944e1cbe5

90 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, including a stream that utilizes eval() and is flagged by ML classifiers as malicious. The presence of obfuscated JavaScript suggests an attempt to hide malicious functionality, likely for downloading and executing a second-stage payload. The ML classifier output of 0.959 indicates a high probability of malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9593

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.
PDF paints image(s) but contains no text operators info PDF_IMAGE_ONLY_LURE

PDF has 1 image XObject(s) and the content stream contains no text-emitting operators (BT/ET, Tj, TJ, ', ") in either raw bytes or decompressed streams — this is the screenshot-as-PDF pattern used to bypass text-based scanners and to deliver instructions purely through rendered pixels. It is informational unless paired with invisible links or risky URI context.
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0065_000.js` `1414f2aa46a91f6980d76eb72ab20bc976747cde82079d7d4dc2fd171bd52b1c`	pdf-javascript-stream	PDF /JS object 65 at offset 0x109E2	72 bytes
`javascript_obj0066_001.js` `54a95856ca1bd5f56e20e4a5df3bc0ef0ef807653974e41cc0af26003514d59e`	pdf-javascript-stream	PDF /JS object 66 at offset 0x10A6B	22757 bytes
`javascript_obj0067_002.js` `a3bdb248d05ca4d978ebb753780bb5ced8191e7ed456086b0f953de0b53bfae9`	pdf-javascript-stream	PDF /JS object 67 at offset 0x13433	267 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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