PDF malware analysis — malicious · d29fcd340d8d6e3b

MALICIOUS

PDF

23.2 KB

MD5: 859dc14c962cf6d152e7abe4741bd2a0 SHA-1: 2b03c9f9623f98d1b60f024ad1c1cb5729b77f15 SHA-256: d29fcd340d8d6e3b8ec898f99e6a384c35143d3266d39c2ed603b636602f7b6e

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 deobfuscate and execute malicious code. The critical heuristic 'CVE_2007_5659' indicates the exploitation of a known vulnerability (Collab.collectEmailInfo) to trigger this JavaScript execution. The script is designed to download and execute a second-stage payload, as evidenced by the deobfuscated JavaScript streams and the nature of 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 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111711_000.js` `da18bd02718d3bd24aa6e9a15a9bc5014a6403d47e22e61bc84ab6b0c8488740`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3624 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` `8c9efda7323183e174ac91c089d320702a9ad26ae76d52e87fffe5e7b1fcaa38`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xFEC	18147 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` `b37935f93002de12d070f7703ce8c9f5d4ba8e3f28821ff696484a24cc0bf692`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x5705	1407 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` `929a71eb7f9084257e5dd37b02e249e27fa6d266042c343ba2a29d1efe072548`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xFEC	1473 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` `893b6a69a6b1f96ef94da875e2c6de5a6ab10d72b7676187c78f81073910b29c`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x5705	80 bytes
`legacy_pdfkit_stage_002.js` `6bb0fa018128f5f95a7ae35f3913d5e16e5bb6a3db011c3d05f63dd8b0849890`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xFEC	1554 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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