PDF malware analysis — malicious · 407edb7e5f0dc4e9

MALICIOUS

PDF

9.3 KB

MD5: 3cf7b25297a3a2b70b44005e1237d3f8 SHA-1: 3104618adbf1ec35c892293ec7107b7a4ae2e9d9 SHA-256: 407edb7e5f0dc4e9b78ef07ba7bbe514097aba79dc7b8c893307aff928878435

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link

The file is a PDF containing embedded JavaScript, which is a common delivery mechanism for exploits. The critical heuristic 'CVE_2007_5659' specifically indicates the use of the Collab.collectEmailInfo method to exploit a known vulnerability. The presence of multiple deobfuscated JavaScript files suggests complex malicious scripting. ClamAV also identified this as 'Pdf.Exploit.Agent-35905', reinforcing its malicious nature. The exact payload or ultimate goal is not clear from the provided evidence, but the exploit chain is evident.

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` `c22498b5030dae12cca2d8336df1d4dbdd1bdc21d3e90bb572475954137e63ad`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	11806 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` `fea08c31509e6646d4920aef62c063ce52ca5246ad9656e5f2a54a4ff214aa73`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	4941 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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