PDF malware analysis — malicious · 49e530380a7fd03f

MALICIOUS

PDF

21.5 KB

MD5: 2cd480309486e99e8853d69655a2105b SHA-1: c0567351079b876252006421f40120101e85e745 SHA-256: 49e530380a7fd03fb6a13d1a001ac22768bfa9d973ffe6c2bb61c57499da64aa

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF sample contains heavily 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 use of a known exploit targeting the Collab.getIcon function. The embedded JavaScript streams and deobfuscated stages suggest the primary goal is to execute arbitrary code, likely to download and run a second-stage payload. The obfuscation makes it difficult to determine the exact nature of the payload without further dynamic analysis.

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` `b42159a44ac2de6afff9727d145fff8f58a3894af44a49098b4ba40aaf519a59`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3591 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` `7054018615c741d3702c9f5bc9ffd0ca6a96f1b09886284a7a0654c6e85caa12`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xFCB	16239 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` `ed6d45423c07824ebede306e23e6726cbf51a37a66b1d953f188583141fc7fda`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x4F70	1552 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` `42c6e0dfc1b4e08e336adc8028ccac82b04e3e6e9e4d4a4ebc532ab6cd132eec`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xFCB	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` `407624ceb11bdfcccd03817d5cc6229f3a3f8dfc15051e1567d07f2b81bcede8`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x4F70	100 bytes
`legacy_pdfkit_stage_002.js` `b2ecddcb18c4ef079cecba2e1dc20fa43e775cb610a398a819cd3026b3fb6a3d`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xFCB	1621 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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