PDF malware analysis — malicious · d9b6f8ead27d3784

MALICIOUS

PDF

51.7 KB Created: 2011-02-03 12:40:17 +02:00 Authoring application: Loans Cheap Wiki (via mPDF 5.0)

MD5: 26765b071b900ad08b26214b47ed6505 SHA-1: 3b3b9907f7ae7cc91c4c6c8b9d8d349fa627494b SHA-256: d9b6f8ead27d37841bbb8b0dff412c91742047be22ccd6c7d4d6ee77b482b9c6

108 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript streams, identified by heuristics as suspicious and obfuscated. The ML classifier strongly indicates maliciousness. The JavaScript actions, including the use of unescape(), suggest the script is designed to download and execute a second-stage payload, likely from a remote source. The extracted JavaScript filenames are included as IOCs.

Machine Learning

Nyx PDF Classifier malicious score 0.9930

Heuristics 4

unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
Suspicious extracted artifact medium 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.
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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0034_000.js` `357d06d70777f397a54fd04180a5ee36f36a8ec5c7cbbafdfab41f20901b25ac`	pdf-javascript-stream	PDF /JS object 34 at offset 0xC730	136 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long hex-escaped blob(s).
`javascript_obj0034_001.js` `607a0753f2d28ea7a383d2e729ee9a1eeb69db22eafb74fa3e1d444ae047c123`	pdf-javascript-stream	PDF /JS object 34 at offset 0xC730	134 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long hex-escaped blob(s).

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