PDF malware analysis — malicious · 97ba75fa630314d1

MALICIOUS

PDF

26.3 KB Created: 2011-01-23 11:45:53 +02:00 Authoring application: Auto Loan Payment Schedule (via mPDF 5.0)

MD5: 724e994a5b19970907045cf022f3d4dd SHA-1: 69e6b2e4380e55781e03f25722ba99b9d9a1e97d SHA-256: 97ba75fa630314d121b619ef05051cbb3d64357119c31d7da98fc9c8900410a5

76 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript streams that are obfuscated using hex escapes. The heuristics indicate that these scripts are suspicious and likely designed to download and execute additional malicious content. The primary attack pattern involves leveraging these obfuscated scripts to achieve a malicious objective, such as dropping further malware. Due to the obfuscation, the exact payload and execution method cannot be definitively determined.

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 0x61A4	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 0x61A4	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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