PDF malware analysis — malicious · 5a0da12ba2e959bd

MALICIOUS

PDF

26.8 KB Created: 2011-02-22 14:48:35 +02:00 Authoring application: End Loan (via mPDF 5.0)

MD5: 8df50a6411c4bca11a5cad10e27460ef SHA-1: ec06fe61565cf551ba91959566ef4618b498165c SHA-256: 5a0da12ba2e959bd4a3af236d2d9013e0d9c29d67b59d89f23a2376233b3cf38

76 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript streams, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. The presence of unescape() calls and obfuscated scripts suggests an attempt to hide malicious code. The extracted JavaScript files, javascript_obj0022_000.js and javascript_obj0022_001.js, are likely responsible for executing malicious actions, such as downloading and executing a second-stage payload. The document body is unreadable, making it difficult to determine the exact lure.

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_obj0022_000.js` `357d06d70777f397a54fd04180a5ee36f36a8ec5c7cbbafdfab41f20901b25ac`	pdf-javascript-stream	PDF /JS object 22 at offset 0x64FD	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_obj0022_001.js` `607a0753f2d28ea7a383d2e729ee9a1eeb69db22eafb74fa3e1d444ae047c123`	pdf-javascript-stream	PDF /JS object 22 at offset 0x64FD	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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