PDF malware analysis — malicious · f272c7082a14315f

MALICIOUS

PDF

22.8 KB

MD5: 5fb489c14695a8ef12d93f619ed080ff SHA-1: 4fd3bb93fd372eb02bf06b30d3bc7e38efc407b4 SHA-256: f272c7082a14315f7d85a5dec64c35a7b1e7a5cf6e1f5a25fa025c24ed2af45d

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 likely responsible for downloading and executing a second-stage payload, as suggested by the obfuscated string concatenation and the presence of multiple JavaScript streams.

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` `f33e5155a88caac177093d892862fe3819c9d9ea333382e29bdbee5b9fdaccfd`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3479 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_obj111712_001.js` `c6bd62d111745bef754aa6eaf0dac254be2297ea66b7a50a793318755fdedbda`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xF5B	17414 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` `7174a974746d2c0a3db3c5626c2f56ee68eb49da48d7b645d5d949453c8fb8b4`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x5397	1842 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` `fe7ca5c1028e68542211c360d30953a4ec2fc8a09167f68f2d8f910da3a437ca`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xF5B	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 0x5397	99 bytes
`legacy_pdfkit_stage_002.js` `f33c52e41f84e78ccff9e320c547339cf7621bd0d0aa74d027b6959363b655c8`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xF5B	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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