PDF malware analysis — malicious · af96fa78797a295d

MALICIOUS

PDF

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

MD5: 31fd959d4ccd4c735fd6cf9a9ee38892 SHA-1: f3459320fde2846d5c5dee334431ba476753077c SHA-256: af96fa78797a295dcb2f7eda2122c3585bb39c401e0978948b4101130b2b8acc

90 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains multiple embedded JavaScript streams, with one stream exhibiting high-confidence indicators of maliciousness due to an eval() call. The ML classifier also flagged this PDF as malicious. The presence of JavaScript actions and embedded JS streams strongly suggests an attempt to execute code. The primary intent appears to be downloading and executing a second-stage payload, as indicated by the heuristic firings and the nature of embedded JavaScript in PDFs.

Machine Learning

Nyx PDF Classifier malicious score 0.9795

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_obj0069_000.js` `a3bdb248d05ca4d978ebb753780bb5ced8191e7ed456086b0f953de0b53bfae9`	pdf-javascript-stream	PDF /JS object 69 at offset 0x10B69	267 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0070_001.js` `54a95856ca1bd5f56e20e4a5df3bc0ef0ef807653974e41cc0af26003514d59e`	pdf-javascript-stream	PDF /JS object 70 at offset 0x10C82	22757 bytes
`javascript_obj0071_002.js` `1414f2aa46a91f6980d76eb72ab20bc976747cde82079d7d4dc2fd171bd52b1c`	pdf-javascript-stream	PDF /JS object 71 at offset 0x13648	72 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.