PDF malware analysis — malicious · b6a299788a25d3ec

MALICIOUS

PDF

9.2 KB

MD5: 4ffd5f8546965f5b458368db68706109 SHA-1: fd51332f110dd4b7e887b6890d7061811b1fe968 SHA-256: b6a299788a25d3ec3287c1ff9239c297435e5ac86a5c965987996d5779d8308f

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The critical heuristic firing for CVE_2007_5659 indicates the exploitation of a known vulnerability in PDF documents. The presence of embedded JavaScript, specifically the unescape() function and the detection by ClamAV as Pdf.Exploit.Agent-35905, strongly suggests that the document is designed to download and execute a malicious payload. The deobfuscated JavaScript streams are likely responsible for this action.

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` `c6584943c6faee3e32d7c51165ce5c1bc0861b60aaad839343668dfcbfd5ecec`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	11709 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` `7d808137c29dea4bbd7449213b5aa238cf39505654e88612154e8cb9acccc8e4`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	4901 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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