PDF malware analysis — malicious · ac102eccb86e04a4

MALICIOUS

PDF

21.7 KB

MD5: 2a05877794ddb74fdf2693c6edc1998b SHA-1: 3e9e915b70daeca148bf37e99b72c0d1b1171743 SHA-256: ac102eccb86e04a4915b4a1d64a3c8a70b90966ad10b32b929b0791738e2050e

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 `Collab.getIcon` method, indicating exploitation of CVE-2009-0927. The JavaScript is heavily obfuscated, but the presence of `eval()` and `unescape()` suggests it is designed to download and execute a second-stage payload. The obfuscated nature and the use of known exploit techniques point towards a malicious downloader.

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` `88b8b42048e70c099787fc0d5bb67bfaca27e842d1cd4f0371fcc9bd4ed25f8c`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3049 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` `7d9d14830f3829817d66554e6c00bc1d381d9420d7e7d6d86f786825555e4aa3`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xDAD	16768 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` `67591aca1ec94eaa2eefc5f2c90f63a5210cffee429563eb69c7921d23300271`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x4F63	1774 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` `fe7ca5c1028e68542211c360d30953a4ec2fc8a09167f68f2d8f910da3a437ca`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xDAD	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` `1265ef3c04efc88b250ecf47e5c67488fea4ac5a422c960baf649f8e2718eaf9`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x4F63	105 bytes
`legacy_pdfkit_stage_002.js` `b61ce5ae9aec2b6ebd62d733fa4de39b21ae64a164f21f29704ff9018f446ef2`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xDAD	1626 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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