PDF malware analysis — malicious · 8026cbab3cc848ce

MALICIOUS

PDF

5.1 KB

MD5: 1cd3a1bf608c2cbcb0b985234ff288f6 SHA-1: 3c94a492694093c9ee3e39044f47f7cd98142998 SHA-256: 8026cbab3cc848ce20fb28c38238414376d13d54c9a6b04948bc2b3f61b0408f

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The `eval()` call and `String.fromCharCode` usage within the JavaScript stream suggest obfuscation and dynamic code execution. The extracted artifact `javascript_obj83960_000.js` is suspicious due to script obfuscation indicators. The script's purpose is likely to download and execute a second-stage payload, although the exact mechanism is obscured.

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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj83960_000.js` `d8ff637bd49e4bc0b43efae372c8c3b452af2a877927a63c9389b19e882612af`	pdf-javascript-stream	PDF /JS object 83960 at offset 0x139	8348 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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