PDF malware analysis — malicious · 5417c2ebaff1de45

MALICIOUS

PDF

9.4 KB

MD5: 3bfef0bec3230c2e7e4c62e195793721 SHA-1: dba6704b0f1e6d0cf82a5d6f3af2fe3d0c5afc67 SHA-256: 5417c2ebaff1de45111a8daf2b2782b9b0a796b28c77d04e92c4c9b2c8ff6f1c

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability through the `collab.collectEmailInfo` method. This technique is commonly used to bypass PDF security features and execute malicious code. The extracted JavaScript streams, particularly `legacy_pdfkit_stage_000.js` and `legacy_pdfkit_stage_001.js`, indicate the execution of further obfuscated scripts, suggesting a multi-stage attack designed to download and execute a secondary payload. The `unescape()` function call further supports the presence of obfuscated JavaScript.

Heuristics 6

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)
ClamAV: Pdf.Exploit.Agent-35905 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35905
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `d8a6b4ad1abf04d0c4a4f89535cfb57f7312edef25c443f4e844c8ec9d0929dd`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	352 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `50b8931793d84cf489152cf4ac149f1b38ea0e2fb4325fc52a83de2b3e67f3f5`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	12183 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `749fd4aa18b50b60cd1dfbe36ef2d145387928a54192fb59b25e25315a2c5507`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	5174 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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