PDF malware analysis — malicious · df57b0749146ac55

MALICIOUS

PDF

26.5 KB Created: 2011-01-28 11:06:00 +02:00 Authoring application: Sovereign Loans (via mPDF 5.0)

MD5: 835be6afd37101612bbc4f63b926bb60 SHA-1: 2a0e0a65be16fb5f0555f3eccca773cd1a3dc401 SHA-256: df57b0749146ac55f443cab79278ee3ea0af0ef18bd6e052874ffe7fcc457508

76 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript streams that are heavily obfuscated using unescape functions. Static triage indicates suspicious artifacts and script obfuscation. The primary function of these scripts appears to be downloading and executing a secondary payload, which is a common technique for initial access and further infection. The specific URLs or execution commands are not directly reconstructible due to the obfuscation.

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_obj0020_000.js` `357d06d70777f397a54fd04180a5ee36f36a8ec5c7cbbafdfab41f20901b25ac`	pdf-javascript-stream	PDF /JS object 20 at offset 0x62BE	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_obj0020_001.js` `607a0753f2d28ea7a383d2e729ee9a1eeb69db22eafb74fa3e1d444ae047c123`	pdf-javascript-stream	PDF /JS object 20 at offset 0x62BE	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).

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