PDF malware analysis — malicious · c7264f2af9e70064

MALICIOUS

PDF

21.0 KB

MD5: 50210c69f83cc045d71e36f729b96542 SHA-1: f60525c6ba7afc01eab9cb9a129de2942ae879d1 SHA-256: c7264f2af9e70064fe5ca9c525ab23c31371bcb3dd9f88ba183fbca49d7e3d80

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that utilizes the `eval()` function and the `unescape()` function, indicating obfuscation. The critical heuristic firing for CVE-2009-0927 points to the exploitation of a known vulnerability in Adobe Reader via the `Collab.getIcon` method. The deobfuscated JavaScript likely attempts to download and execute a secondary payload. The presence of multiple JavaScript streams and the specific exploit targeted suggest a downloader or initial access stage.

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` `ff5d99b439bc0acf77ca4babf6272d778e2b608a1de10d9ecca1ce108c2954e6`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3332 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` `b066773d66210d7cba93c41911792cf2396d3025e1d51e3d5804c3af9b73559a`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xEC8	15791 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` `9016bd21b31ffa44682e95635bdb4dbacf85f1a378591e02d8db3581234dd787`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x4CAD	1796 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).
`legacy_pdfkit_stage_000.js` `f89df567ac1524aa97d7d1c2e318640fc4fa1525d608905c9904da2f1b756863`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xEC8	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` `1397a77c63e5e8be02a059fd3c671fb708b92cb64d00ded4f2045e71093dec16`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x4CAD	99 bytes
`legacy_pdfkit_stage_002.js` `0039977f928e39f39a1396c65af6df099edb021f77e9085f9dbfc13080e52074`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xEC8	1620 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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