PDF malware analysis — malicious · 3b42c4531cfcce63

MALICIOUS

PDF

2.6 KB

MD5: 5bb8c8f1a17cd2510bd3681ce6c2deb4 SHA-1: 82175e1bc50c9ceef6eb7a29d5f1f84042fe5fcb SHA-256: 3b42c4531cfcce63151ae97493c3a72c100e50b5cf0fb516851e81501d83b9ca

78 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell T1566.001 Phishing: Spearphishing Attachment T1140 Deobfuscate/Decode Files or Information

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings related to PDF JavaScript actions and streams. The `unescape()` call and `ASCIIHexDecode` filter suggest obfuscation techniques commonly used to hide malicious code. The extracted JavaScript file, `javascript_obj0006_000.js`, is the primary artifact, likely responsible for executing the next stage of the attack, such as downloading additional malware or establishing persistence.

Heuristics 5

unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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_obj0006_000.js` `79795146c46ba896dda834b2ee29dfa1dd6df56bf03ff9560a9b87e0c84e1d21`	pdf-javascript-stream	PDF /JS object 6 at offset 0x12D	596 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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