PDF malware analysis — malicious · b705921b927700a9

MALICIOUS

PDF

2.3 KB

MD5: 4b0889af5dd835dd402bd6740adc11f9 SHA-1: 441e926ae83c436785fe4840af6ed14d647a15d1 SHA-256: b705921b927700a97ded1c9db69072dae44f8d26b2f03ffc5bd7088ffa7e7460

238 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.001 Malicious Link T1059.003 Windows Command Shell

This PDF document contains embedded JavaScript that leverages CVE-2009-0927 and CVE-2008-2992 vulnerabilities. The JavaScript is obfuscated and uses eval() to execute, indicating it is designed to download and run a secondary payload. The ClamAV detection of 'Pdf.Exploit.Agent-35646' further supports the malicious nature of the embedded exploit.

Heuristics 7

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)
util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992

PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (identified after JavaScript deobfuscation)
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0009_000.js` `6cba02838cae0523d3ddcc9da7aed8d0f1a8dec1aa40faec10caf56c32424dc2`	pdf-javascript-stream	PDF /JS object 9 at offset 0xBC	20980 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `d8fb84a7acf8bece2a366ec56ec2c55605259633684f6996e79f5c43f91e317d`	deobfuscated-js	split-join delimiter stripped JavaScript at offset 0x103	5731 bytes
Detection ClamAV: Pdf.Exploit.Agent-35646 Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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