PDF malware analysis — malicious · bf52150ea6bbfbf4

MALICIOUS

PDF

21.1 KB

MD5: 2977673f1510725ef0b775ff580cbb76 SHA-1: c6f629b3972da0512a7d1c57f954a8dbc9b9faa2 SHA-256: bf52150ea6bbfbf4181675752d32647af9d05aaf619ff126d7bfc3e7bea0eaa7

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains obfuscated JavaScript, which is a common technique for exploiting vulnerabilities. The critical CVE_2009_0927 heuristic indicates the use of the Collab.getIcon method to trigger an exploit. The JavaScript uses eval() and unescape() functions, typical for deobfuscating and executing malicious code. The primary intent appears to be the execution of a second-stage payload, likely downloaded from a remote source, leveraging the CVE-2009-0927 vulnerability.

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` `d27573dbcd37d4dd57347fa6f03e70ad4abdf5ea04d2c789181b7618f27f11a8`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3614 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` `d3d00b27131db344e83372bdcf330626b223ff0090761b8296af48c54844f98c`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xFE2	15625 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` `a2c0a949d4c8f568bdd5c980d6c37ff6cfb091808c7da53832ca74fd83bf4814`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x4D21	1825 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 0xFE2	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` `1397a77c63e5e8be02a059fd3c671fb708b92cb64d00ded4f2045e71093dec16`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x4D21	99 bytes
`legacy_pdfkit_stage_002.js` `18dd78865cd73c9ec021416354ea6415fc0491bd261a790f828b79bea889b3e6`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xFE2	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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