PDF malware analysis — malicious · d7041650cee9b342

MALICIOUS

PDF

21.8 KB

MD5: dd41feba5f09c06aa4eb228fb3aadff6 SHA-1: fedb81e431913cd36e61c473118277e25d0c6cc6 SHA-256: d7041650cee9b342fd5cf9e0f5d8c2bbb62fad7146380af643a97b52abe508fa

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1071.001 Web Protocols

The PDF sample contains obfuscated JavaScript, including multiple calls to eval() and unescape(), indicating an attempt to hide malicious code. The critical CVE-2009-0927 heuristic firing confirms the exploitation of a known vulnerability via the Collab.getIcon method. The deobfuscated JavaScript streams suggest the primary goal is to download and execute a secondary payload. The confidence is high due to the specific exploit identified and the clear obfuscation techniques used.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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` `ce5892e0ea4fc4e8f27254601763ff06607abf658aa2d90c71f1c730869e326d`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3224 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` `8687c5117d635b7726ff0c3d15f032a07a417f36a1414ef4b08f215f128af7ce`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xE5C	16669 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` `9d9827ea721c05bd5f2acf6b7308d8391a7da90982e568c137dd4b784fe94ee6`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x4FAF	1802 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` `0e0b9beb836855dc42f5776bcade81ac045f6f4d1494c7dbd0f04926beff7380`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xE5C	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` `95d52c265d60ffad372da99bb3db5c3f0b48fc84b1aaa90902895f12786cdc82`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x4FAF	99 bytes
`legacy_pdfkit_stage_002.js` `ebefa54491f187a2b8214c84e4a71185aaff8331f18bc28359e3066ec694d720`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xE5C	1625 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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