PDF malware analysis — malicious · 9f3927a02ab3e6fa

MALICIOUS

PDF

30.3 KB Created: 2009-05-01 21:21:45 Authoring application: ghjkSFghjkCPx (via afdsdgf)

MD5: c0be593efa20145dd658e0c3831fa1ef SHA-1: 7fb31b8d01c7a4d7f0f542bd9ed04e5a6f4fea85 SHA-256: 9f3927a02ab3e6fa98183f98f9579e4daae8fb3aeace8204b6f0c27794632a83

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1027 Obfuscated Files or Information

The PDF contains embedded JavaScript streams with high-confidence indicators of maliciousness, including eval() calls and obfuscation. The script likely reconstructs and executes a payload, as suggested by the string concatenation and eval usage. The ML classifier strongly indicates maliciousness. The reconstructed string 'tp.split('@')' is a key indicator of the script's intent to process or deobfuscate further content.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `495bbc30159b729ade7b0782a4507b76bcd405f915dbccb41c2871b36be5f53e`	pdf-javascript-stream	PDF /JS object 7 at offset 0x21C	29827 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).
`javascript_obj0007_001.js` `1c5411838e26323c9f974062c46850e881ee3535ea60c01fdc1bd7e263d7f78f`	pdf-javascript-stream	PDF /JS object 7 at offset 0x21C	28923 bytes

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