PDF malware analysis — malicious · 9524817edad168b0

MALICIOUS

PDF

24.8 KB

MD5: 2345153dbd779d78eb0153dabd8aa903 SHA-1: 61c6bbe4f98b51ccae6e18cd577f517882ddba99 SHA-256: 9524817edad168b0a7b66a5daf31740ee6472ce6765af3df4bacca641642ba7a

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.001 Malicious Link/URL T1071.001 Web Protocols T1059.003 Windows Command Shell

The PDF file contains embedded JavaScript that leverages the CVE-2009-0927 vulnerability (Collab.getIcon). The JavaScript is heavily obfuscated but appears to be designed to download and execute a second-stage payload from a remote source. The presence of multiple JavaScript streams and the use of eval() calls are strong indicators of malicious intent. The exploit targets a known vulnerability in older versions of Adobe Reader, suggesting a drive-by download attack pattern.

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` `ea118b41e3f610951585870ccdba3bfe3ef581991c1c6f519fc1c5aa70e340d5`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3529 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).
`javascript_obj111712_001.js` `a6127a22c9288fc3b4d482b0a8ba16eaa0cb6beb3f6e44b429a2c3a11e40dd03`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xF8D	19696 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_obj111713_002.js` `5105aef1dd050c0b1f3f4c719ab8c1ae8f8746fb5faabef00f857b8f95eb39ea`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x5CB3	1571 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).
`legacy_pdfkit_stage_000.js` `4349a984ce6e3c6a8083a2092ff6f5cee48cbceda7442da693bc10b828d93525`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xF8D	1525 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` `407624ceb11bdfcccd03817d5cc6229f3a3f8dfc15051e1567d07f2b81bcede8`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x5CB3	100 bytes
`legacy_pdfkit_stage_002.js` `99a517844544b2f81fe2923b2cd3b8d468f16bbbc0b638fb00339ad6aa95edc1`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xF8D	1626 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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