PDF malware analysis — malicious · 45a8884aec24d96a

MALICIOUS

PDF

22.8 KB

MD5: 7c466a80dc5eac7170dfd2cf683cede2 SHA-1: 3ebf572f84c17e9c0b118e0f18b284525ee8c9a5 SHA-256: 45a8884aec24d96a09389e5d05ac7827f0604804ebf0019d1cf45f4fbf5d7bd5

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF sample contains embedded JavaScript that utilizes eval() and unescape() functions, indicating an attempt to obfuscate malicious code. The critical CVE-2009-0927 heuristic firing confirms the exploitation of a known Adobe Reader vulnerability via the Collab.getIcon method. The embedded JavaScript is designed to download and execute a second-stage payload, as evidenced by the obfuscated string concatenations and the use of eval().

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` `43db5821356964321e2c8471a97c9fa34e02ca06802d90016266d5fdc2712ff2`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3036 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` `b62593fa2bd335a75a86630b3884a9835ce0d192168507206517e10f8104eff2`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xDA0	18055 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` `edbd6edee74d309a355a783d3ed953cd2637939d19f5a2e0e9ec696da567b852`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x545D	1689 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` `a7bf9e8f3472d8e456111af54d3cbfd9bd06c7e59489254ed4481e1c4d057ace`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xDA0	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` `95d52c265d60ffad372da99bb3db5c3f0b48fc84b1aaa90902895f12786cdc82`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x545D	99 bytes
`legacy_pdfkit_stage_002.js` `7983f75ca58807096a192c0596a945b237533ae2d204b86f0eeae10c6011045b`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xDA0	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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