PDF malware analysis — malicious · b692edd0f3cceb27

MALICIOUS

PDF

2.8 KB

MD5: 6d0b553c834d6f239d6751840321ca82 SHA-1: 30b2530176951023805b4ef4727c5068a6afc41b SHA-256: b692edd0f3cceb27868cdfcf6489e0871c47e475f3f756b0e874b31c455f2380

66 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The eval() and String.fromCharCode() functions suggest obfuscated code execution. The primary function of the embedded JavaScript appears to be the execution of arbitrary code, likely to download and execute a secondary payload. The lack of specific strings or URLs makes definitive family attribution impossible.

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_obj111611_000.js` `abf01e17e8b4972d64ad5b2e3de12aee1202621a105b09abaddd515553792a20`	pdf-javascript-stream	PDF /JS object 111611 at offset 0x197	257 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj111612_001.js` `f8b796202c983abc86cc1dbb0106e77ea3b15d0f176eedae8f5a2bd1fc44c44b`	pdf-javascript-stream	PDF /JS object 111612 at offset 0x267	3289 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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