PDF malware analysis — malicious · b0863daaf2ef1133

MALICIOUS

PDF

11.3 KB

MD5: 807495515ac971a1addde9347dfe643b SHA-1: 65c7e39bb9e732c4d7ef828e8c32ae8dc9c32526 SHA-256: b0863daaf2ef1133bc13f87069c37d70e1e7869ae92716da4b79a4b2e63dd80d

78 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell T1204.002 Malicious File: Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The JavaScript stream is further obfuscated using unescape() and ASCIIHexDecode filters, suggesting an attempt to hide malicious code. The primary purpose of the embedded JavaScript appears to be the execution of a second-stage payload, as evidenced by the 'javascript_obj0006_000.js' artifact.

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` `cb4731d70b2a705d06f765f0f3b42d1bc9cc845f35977273ca5336dce3ef1dc8`	pdf-javascript-stream	PDF /JS object 6 at offset 0x12D	3177 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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