PDF malware analysis — malicious · ff08b06ee0392d0b

MALICIOUS

PDF

9.4 KB

MD5: d8e8bf315c1b477b5c0d7a9917bf6b25 SHA-1: 8b0e068870183f26d1f3a8f0aaf4acc6db7e0796 SHA-256: ff08b06ee0392d0b4aa854f66cbc4f64cf2ce21a32223f9347a5cd83c4797d37

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link or False Update T1204.002 Malicious File

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability through the 'collab.collectEmailInfo' method. This exploit is designed to execute arbitrary code, indicated by the 'unescape()' call and the detection as 'Pdf.Exploit.Agent-35905' by ClamAV. The embedded JavaScript streams are highly obfuscated, suggesting an attempt to conceal the malicious payload's execution, which likely involves downloading and running a second-stage exploit or malware.

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` `97c904bca4e9f9ef59dae2b3f920a2115d194067e14115b79c8146ca237c1c50`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	11989 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` `b9a3c127cef8771316e7636782c9dc38311972215688e93264b531b41dbbe47d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	5043 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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