PDF malware analysis — malicious · b5f75a36672a5ebb

MALICIOUS

PDF

9.4 KB

MD5: 4a5323870a7b231fda4467323cbf34a6 SHA-1: ddc18df15b543e47a4c44bcbb884174578503dbb SHA-256: b5f75a36672a5ebb26dc0b55c2abd099b39b5b8037349ae235b00c8824bbfbd5

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious Link

The PDF file contains embedded JavaScript that utilizes the 'unescape()' function and exploits the CVE-2007-5659 vulnerability via the Collab.collectEmailInfo method. This indicates the file is designed to execute malicious code upon opening. The ClamAV detection 'Pdf.Exploit.Agent-35905' further confirms its malicious nature. The primary attack vector appears to be exploiting a known PDF vulnerability to achieve code execution.

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` `ec8e1c152b1589e7ae6b42c7c08d28c53539b12b712c2985d3e4199e3915b1bb`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	12000 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` `730b93d3cd510a25a8c9af3804adec7c153af63fc5907142799d5829e04f88f4`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	5064 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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