PDF malware analysis — malicious · f2f5062b876fdf19

MALICIOUS

PDF

7.6 KB

MD5: 3b485211622c915811e86b511cfe6732 SHA-1: b3058f6c9bfaabadaef144dc283529a9043a9c7f SHA-256: f2f5062b876fdf19631b0deb4520d87aa64ace0ece6e8cca8b1306306b227218

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT', 'PDF_JS', and 'PDF_EVAL'. The 'PDF_EVAL' and 'PDF_FROMCHARCODE' firings suggest that the JavaScript code is likely obfuscated and uses dynamic execution methods. The presence of JavaScript streams and the nature of the firings indicate that the file attempts to execute arbitrary code, a common technique for delivering malware. No specific family could be identified.

Heuristics 5

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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0004_000.js` `286eb1b1ca48fbdc2c713a0e02ec07e04872913f6af80cf6629e6fb55a26eda9`	pdf-javascript-stream	PDF /JS object 4 at offset 0xE1	309 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`stream_002_off00001c56.js` `b30886f8da068e368febd1e6ca3d4d59c4fbd3516346fe628aa8a917195bd66e`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1C56	302 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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