PDF malware analysis — malicious · c75182b4381fcbc7

MALICIOUS

PDF

9.3 KB

MD5: a16757fb53a682ec160de4ef1b731927 SHA-1: 8e1699bcef9b5d195b9791e07d0052b0d00e0c5f SHA-256: c75182b4381fcbc7b3d5b7689e177d88b5185e6beb7f368178afb0d02d6b6b06

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The file is a PDF containing embedded JavaScript, which is used to exploit CVE-2007-5659 via the Collab.collectEmailInfo method. This exploit is designed to execute arbitrary code. The presence of multiple deobfuscated JavaScript files and the ClamAV detection strongly indicate malicious intent. The primary attack vector appears to be leveraging a known PDF vulnerability to run embedded scripts.

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` `5f12a4ef80262338d391675deeca9ec6034819e740517810e22360239bd87baf`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	11750 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` `b186d33eed033a106fedd8e303e0fadd1922f49ee4fc7401d5f5d530cb083bbd`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	4924 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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