PDF malware analysis — malicious · 864888cd72e70ba2

MALICIOUS

PDF

1.6 KB

MD5: 965cf1007863eaba019ad6c8acbd17c4 SHA-1: 6acab3ca797207de82468353115137b04e203bc7 SHA-256: 864888cd72e70ba249b0877b0b10b4ee6f0f04ddbee4556a2ea1249afe48472e

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Script Execution T1566.002 Phishing: Spearphishing Attachment

The PDF file contains embedded and obfuscated JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The ClamAV detection further confirms its malicious nature. The primary attack vector appears to be the execution of this JavaScript, likely to download and execute a secondary payload, though the exact script functionality is obscured.

Heuristics 6

ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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_obj0009_000.js` `a0adaf8ac07acad758f9181a6b16fb67f86102bb1794aca9782a288fef680bed`	pdf-javascript-stream	PDF /JS object 9 at offset 0xDC	3909 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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