PDF malware analysis — malicious · 3577a6a7be0d83d9

MALICIOUS

PDF

14.8 KB

MD5: 40c0fdfc7e228c90ee313899151ee6c2 SHA-1: 24bea3c6e028d8e2be7999b4a42d34fd9c18236f SHA-256: 3577a6a7be0d83d99a8fdd5afe00a094e81891b6f9893e395dee983659cd7e0f

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded and obfuscated JavaScript, as indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The PDF_UNESCAPE heuristic suggests that the JavaScript is further obfuscated. ClamAV also flagged this as Heuristics.PDF.ObfuscatedNameObject. The primary function of the embedded JavaScript appears to be downloading and executing a second-stage payload, as evidenced by the extracted javascript_obj0006_000.js artifact. The exact nature of the payload cannot be determined without further analysis.

Heuristics 5

ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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` `8b1ff17a0e2ed7e76f0d882c7cd22975fa9e0d13e45ad0eea048f40b5d23b432`	pdf-javascript-stream	PDF /JS object 6 at offset 0x18D	15777 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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