PDF malware analysis — malicious · 4fc3e49651ae68e7

MALICIOUS

PDF

9.4 KB

MD5: 1df714bba9698e1f917b1e1a9351850c SHA-1: ed2c77944a806edfc481b62be93ee37f51b33299 SHA-256: 4fc3e49651ae68e7a47d0132e1f8dc992acb196eb681d342ab64b2f0510473a8

180 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 exploit is designed to execute arbitrary code, and the presence of multiple deobfuscated JavaScript files suggests a multi-stage attack. The primary goal appears to be the execution of a secondary payload, as indicated by the exploit's nature and the detection by ClamAV as 'Pdf.Exploit.Agent-35905'.

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` `29742a7993f15f60eac9e1c74c0e7ae3c146cef601a71b922900b08efc060e45`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	11909 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` `4e5ba90ae8208d3eefbf32bf79e97d9c8667534283f82e3a382a4f79faa2d838`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	5069 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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