PDF malware analysis — malicious · ff2e4f3bee4c6c71

MALICIOUS

PDF

20.1 KB

MD5: 9d3846ec8810550bdfa84a412626ea38 SHA-1: 4331f38fb7ebe6d10df3181ae4de742e327fe484 SHA-256: ff2e4f3bee4c6c719a9d48b6003be3bf7b87e200b1bee2d5d7f3f9b5ad9a1e74

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF sample contains obfuscated JavaScript, including multiple calls to eval() and unescape(), indicating an attempt to hide malicious code. The critical heuristic firing for CVE-2009-0927 (Collab.getIcon) confirms the exploitation of this specific vulnerability. The embedded JavaScript streams and deobfuscated stages suggest the primary goal is to download and execute a secondary payload, characteristic of 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` `3b0b252524880090cc6b0e1610a0af601015de6c906fa5363fa59a63137b8c9b`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3260 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` `7a32b024995ec0901d331c62a8e9cdb75db810e197e16db08067b5b36d36ea6a`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xE80	15108 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_obj111713_002.js` `9ed1909b09f5a5c4dcb25224fe952e1fe302c814c198f17e71a5bd206484b2cd`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x49BA	1589 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` `42c6e0dfc1b4e08e336adc8028ccac82b04e3e6e9e4d4a4ebc532ab6cd132eec`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xE80	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 0x49BA	99 bytes
`legacy_pdfkit_stage_002.js` `82baf83c245d2823a5fa2fdd812a45c171a1eb272143e00b062f225348025f4c`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xE80	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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