PDF malware analysis — malicious · 9eaf1ddfaaaa286b

MALICIOUS

PDF

23.3 KB

MD5: 0e63602b2ffc7da469e9595e2b0c54e3 SHA-1: 51c7fea55388ee054e730f93160a4fb504f333e0 SHA-256: 9eaf1ddfaaaa286ba2ffb7b69a64cb688e3f0693a8c0ddde5ffa09309580f035

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that utilizes the `eval()` function and `unescape()` to obfuscate malicious code. The critical heuristic firing for CVE-2007-5659 indicates the exploitation of a known vulnerability in Adobe Reader via the `Collab.collectEmailInfo` JavaScript function. The embedded JavaScript is designed to download and execute a second-stage payload, as suggested by the obfuscated code and the presence of multiple extracted JavaScript files. The primary attack vector is likely a user interaction with the malicious PDF, triggering the exploit.

Heuristics 5

Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (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 7

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111711_000.js` `bfc3d4fdca6ed80df025e7bcb3cc194246bf4723c4394f9541f62e8078293d08`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	4064 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` `20eeb61258117ee3dc0f7dafd44ac4799d14625d75fcc32649e27cd8db81789a`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x11A4	17605 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` `d699e587ea907b5bc81f899a9f2cf26365d8641b2b349531eede2f3bf272642b`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x569F	1599 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).
`legacy_pdfkit_stage_000.js` `afd03d65583f6e219990725d99f4837917afa4eaaf9ec5c5381cb751c0a59dba`	deobfuscated-js	double percent-decoded annotation JavaScript at offset 0x11A4	16819 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 13 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `506b14da4a3edf312ef47822a545091f9b60487eaa453907d4768b9befc7325c`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x11A4	1469 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_002.js` `45f33a2b6011dbedaffbca7d7ed47c6f494a02676d7ebb603cee90d70a37c9b2`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x569F	79 bytes
`legacy_pdfkit_stage_003.js` `87022490bd441b453adf2e3eebe69177fe6e3c63b5fe8112dcd24f1aef6e5369`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0x11A4	1549 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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