PDF malware analysis — malicious · d53c71a3cff91ecd

MALICIOUS

PDF

22.1 KB

MD5: 596691e3c6bee531a97bd0e3d635a60b SHA-1: ea8e77a80e28b7be1082abdba974666143aa6de4 SHA-256: d53c71a3cff91ecd8a42deb777a5cc9fd5e682364ac385328cff181094af05b1

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF sample contains embedded JavaScript that utilizes eval() and unescape() functions, indicative of obfuscation. The critical CVE-2009-0927 heuristic firing confirms the exploitation of a known Adobe Reader vulnerability. The embedded JavaScript is designed to download and execute a second-stage payload, as suggested by the 'eval()' calls and the nature of the CVE exploit.

Heuristics 5

Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927

PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (identified after JavaScript deobfuscation)
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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.

Extracted artifacts 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111711_000.js` `c235b1f938a7e99180c333bbf109e4e00a6d81520be10246ae48c9ad28370b8f`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	4062 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 6 long base64-like blob(s).
`javascript_obj111712_001.js` `9c167489f35b5d2a7139ba3e319da35edd38b40a4496971e3ab6cc6d0afb7a93`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x11A2	16192 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s).
`javascript_obj111713_002.js` `e9e0bbc699d90090fcd3798d5f361d80e70c1dd87acdb31397e9135fe7ed8617`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x5118	1791 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s).
`legacy_pdfkit_stage_000.js` `a7bf9e8f3472d8e456111af54d3cbfd9bd06c7e59489254ed4481e1c4d057ace`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x11A2	1520 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `a2e7b401957325147178ab6df625a2bbd3f110115ff9031cf3c2f4eb29c2f9db`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x5118	106 bytes
`legacy_pdfkit_stage_002.js` `7cbe6362e0666c942cb5e14bb7caab79fbb52c1ae3b07b6110f84fce909ec785`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0x11A2	1627 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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