PDF malware analysis — malicious · d58b7dd625627643

MALICIOUS

PDF

20.0 KB

MD5: 232b50a65839160f118a7f4dbe735414 SHA-1: c879bcc953340567a59ddca6c1539905cf824802 SHA-256: d58b7dd62562764322be59c26137ea23257fd227c17a81c252ae9c190a9a78db

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that leverages the CVE-2009-0927 vulnerability through the Collab.getIcon method. The JavaScript is heavily obfuscated but appears to use eval() and unescape() to dynamically construct and execute code. This technique is commonly used to download and execute further malicious payloads. The presence of multiple obfuscated JavaScript streams and the specific CVE exploit indicate a malicious document designed for exploitation.

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` `d468bbfac7838e32511026737d53b7fc8081d1193c50ab4afb9eaf0504abe7c5`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3492 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` `4549ecbb4ca7b99b7e16c84e53f530499842265e5fafc7b1ad6ac6afb9950679`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xF68	14741 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_obj111713_002.js` `b23663138c2374023e9b32d6abbca28def53c40fabe50b7d15d3cd761ebdcf8b`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x4933	1667 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` `0880095e45c1d5df17d3fe2f82e6490b33ee1465ce10c02b3c1faa15ee3aed47`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xF68	1523 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 0x4933	99 bytes
`legacy_pdfkit_stage_002.js` `2753c7287ce7f0cce66b624cc3e990f3f6a36adde24c13b04895ca316be2d04a`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xF68	1623 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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