PDF malware analysis — malicious · 9db3cd0b79f201ee

MALICIOUS

PDF

22.6 KB

MD5: b64da1e64a7bf3eafea65ca49acfe231 SHA-1: 4bd236d0d71029b88430cd872ac57664b7df8f30 SHA-256: 9db3cd0b79f201ee2b97e5d729dc87a3d7d6f6a1451f9c92ce06b69f3f6e50c0

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF sample contains embedded JavaScript that utilizes the 'eval()' function and 'unescape()' for obfuscation, a common technique for exploiting vulnerabilities. The critical heuristic 'CVE_2009_0927' specifically indicates the use of the Collab.getIcon method, confirming an exploit for CVE-2009-0927. The embedded JavaScript is designed to download and execute a second-stage payload, as evidenced by the obfuscated code and the heuristic firings. The attack pattern is consistent with a PDF-based exploit kit delivering further malicious content.

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` `455a4691e3815d97573893608f81d21ecbb5e7503c9e7d0cc1ec83d278c725a4`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3018 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_obj111712_001.js` `c82046fb364170c424d6513365f8bd410fb8f89bcb8f393463c918109055c808`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xD8E	17799 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` `c91162490b9ce18362e30ab8beb26ca494293f3490764694fb1cf5b8d1c87190`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x534B	1729 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` `42c6e0dfc1b4e08e336adc8028ccac82b04e3e6e9e4d4a4ebc532ab6cd132eec`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xD8E	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` `95d52c265d60ffad372da99bb3db5c3f0b48fc84b1aaa90902895f12786cdc82`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x534B	99 bytes
`legacy_pdfkit_stage_002.js` `82baf83c245d2823a5fa2fdd812a45c171a1eb272143e00b062f225348025f4c`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xD8E	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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