PDF malware analysis — malicious · 9393546fbab33703

MALICIOUS

PDF

6.5 KB

MD5: d24342b3f93c714f17f443e0c30edc46 SHA-1: 303badb77c5e51d0fd23e127024084020760ee14 SHA-256: 9393546fbab33703262f786ac4820707df7d9239e641b691f3cee542f52dd25f

78 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The PDF_UNESCAPE heuristic suggests that the JavaScript content has been obfuscated using unescape() and potentially other methods, and the PDF_FILTER_HEX rule firing points to the use of ASCIIHexDecode, which can be used to hide malicious content. The extracted JavaScript file, 'javascript_obj0006_000.js', is likely responsible for downloading and executing a second-stage payload. The confidence is high due to the multiple heuristic firings related to JavaScript execution and obfuscation within the PDF.

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` `b4a3b3a449089f9a378ca0bbfaf6b19721fd50faca88c9eec74f42672032fb75`	pdf-javascript-stream	PDF /JS object 6 at offset 0x12D	7832 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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