PDF malware analysis — malicious · 3c2809f17952cba1

MALICIOUS

PDF

9.4 KB

MD5: c4512216f92d1fbe4e78b968bf5bca5e SHA-1: 1496e561436e41f4f0d869b2f4293edf812fa764 SHA-256: 3c2809f17952cba18daaff78afa74f0c909f1c41f0e73e528fbfc9324234a805

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

The PDF file contains embedded JavaScript that is obfuscated and uses the `unescape()` function, indicating malicious intent. The critical heuristic `CVE_2007_5659` specifically points to the exploitation of this known vulnerability via the `Collab.collectEmailInfo` method. This technique is commonly used to download and execute further stages of malware. The ClamAV detection further confirms the malicious nature of the file.

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` `1f3c5c1eeb6ebc12e62a42772e2460c6d1566d5b84ba850c0ce79da0f0627d0a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	11900 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` `06d90a40a3c5a32e1567fa30c096e7cab556a7dd6bf3b56b4a9813eb4ba73ad5`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	4965 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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