PDF malware analysis — malicious · d3c7ed3d769268b3

MALICIOUS

PDF

9.2 KB

MD5: fa709de59f6fabb20dd1e8668673c8c3 SHA-1: 4bf26a28b9ca61545fd8e4e7dac1417402f98888 SHA-256: d3c7ed3d769268b3e3e032f0654ffeb0ff97ed7d5c0cbc9cb70cb50af3411bce

178 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 JavaScript, which in this case is heavily obfuscated but likely serves as a downloader for further malicious content. The presence of multiple deobfuscated JavaScript files and the ClamAV detection strongly indicate a malicious exploit delivery.

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` `cdf8f8a4ca65ccd70878b6c5c586ed5a86f3bdaebd7dbc70f4d33d34349f1506`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	11610 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` `934d0bfec0eaafb17c64609bf36f7154396a5bbfd813162281fb1d3b3c2b4ebe`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	4896 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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