PDF malware analysis — malicious · 45601465b685d63b

MALICIOUS

PDF

23.4 KB

MD5: 0ab252ecf9bfec025629709c277bd44e SHA-1: ae82962983777fa3ea52bbc8d0a8a7dbd9410cd1 SHA-256: 45601465b685d63b2a13df50f94504daae24c0f78231b6d6f7f169c1744aa205

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 the `unescape()` function, indicating obfuscation. The critical heuristic firing for CVE-2007-5659 confirms the exploitation of a known Adobe Reader vulnerability. The embedded JavaScript is designed to download and execute a second-stage payload, as evidenced by the deobfuscated scripts and the heuristic firings.

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` `c6946254a9352c564c1f2ef105fdb9dfdc77d23d7fe8f0c0602291a9b59a6113`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3929 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` `c44272f162fad23cef3fc2fbf705b7e59529dcd692c13bc6899601c2bc15d7f1`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x111D	17942 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` `42b3448e5fdb0126b42831dc68f1b863fb644b62ef8fc97edb4b9b0cadca9588`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x5769	1548 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` `3ce2f209b540fb36eed49cc31ae3f37f7cea4ebc079e3cbb3b999b83a97c1eae`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x111D	1469 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` `35a581ba48ca706a1fa7df7e3dedfffcfbb26344a30622ab582b8fdd80abd2e6`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x5769	86 bytes
`legacy_pdfkit_stage_002.js` `7e9c98a5ed915022ab9d3718deee2c560391df64c6939d74516a9ade525648cc`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0x111D	1556 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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