PDF malware analysis — malicious · bca0170070149aa5

MALICIOUS

PDF

9.3 KB

MD5: 98da37b10b94a797324b136f27314c66 SHA-1: 1fa3fc3f363ac0ceca70c351099e2f64f4e4ff1a SHA-256: bca0170070149aa5bee0362bd1ca83f02583414845e415bd80d57575f8341af0

60 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF was flagged as malicious by an ML classifier with high confidence. It contains embedded JavaScript, indicated by the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic. The extracted JavaScript files, 'stream_002_off00001c11.js' and 'acroform_b64_00.js', are likely responsible for executing the malicious payload. The presence of XFA forms also suggests a potential vector for script execution.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 3

Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD

PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
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
`stream_002_off00001c11.js` `1f0fdd4c0227a306ab9cb6f21b9382adc1bca0e4df9b31697ea030417dae1cdb`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1C11	3534 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`acroform_b64_00.js` `df0136fecd4a6943726a9335fbd9ff1d7402033eb9a15f99dedf7635367abefb`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0xE8	8314 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 3 long base64-like blob(s).

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