PDF malware analysis — malicious · 5eaacfd654e316f2

MALICIOUS

PDF

3.1 KB Created: 2008-07-02 07:51:49 -07:00 Authoring application: Adobe InDesign CS3 (5.0.2) (via Adobe PDF Library 8.0)

MD5: 38f6acda0217f876235fab5a485a73ab SHA-1: 11660c95e957f30328aaf97f92d0860436ee2d46 SHA-256: 5eaacfd654e316f200adce48900a7a780a4b97b83b5fea7e531ac6d5df192754

150 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript that is heavily obfuscated. The script reconstructs and then unescapes a URL, which is then used to download a second-stage executable. The primary function of the script is to download and execute a payload from the reconstructed URL: "http://64.22.81.244/style.exe?id=0&sid=97a192a59cac9dae9cad90e480e3d0a0cdf0c0f3cbfbcdfca0&e=98". This indicates a typical downloader or dropper functionality.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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.
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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://64.22.81.244/style.exe?id=0&sid=97a192a59cac9dae9cad90e480e3d0a0cdf0c0f3cbfbcdfca0&e=98

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `12cb5d30bc164a274c7add947a1c70a44dcc5c9698ea36c2bdfc4c4d7957479c`	pdf-javascript-stream	PDF /JS object 13 at offset 0x377	2623 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.