PDF malware analysis — malicious · 9f8f6f49510aa1d5

MALICIOUS

PDF

17.7 KB Created: 2009-03-13 14:43:19 Authoring application: eM3BL0 (via aqO9KSudUZz3)

MD5: 5e2df9dce3168fd71117d79a2753eb3c SHA-1: 0bc7f07304462c71545bfc3d5cc5b630123f5556 SHA-256: 9f8f6f49510aa1d5d71bf9bd3528e0efe7066a12fa828b3b043cbc63ab30d425

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The PDF_EVAL heuristic firing suggests that the JavaScript code is obfuscated and uses `eval()` to execute, which is a common technique for downloading and running second-stage payloads. The extracted artifact `javascript_obj0007_000.js` is also suspicious. While the exact payload could not be determined due to obfuscation, the overall pattern points to a malicious downloader.

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.
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_obj0007_000.js` `fd613c9587db6cdb98022901b3e65f6e6d0d747fb0c54618bb6b3fef2f9bd60b`	pdf-javascript-stream	PDF /JS object 7 at offset 0x23C	16927 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s).

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