PDF malware analysis — malicious · ffe31d1dd570c166

MALICIOUS

PDF

9.4 KB

MD5: fd5c9ff8dd1b4486355b5483450121c9 SHA-1: 577499c00f6da5ae660609f0cc5115e7dec32fe2 SHA-256: ffe31d1dd570c166a0a5d27744790f5d379bad6419586a770c49b8fbe5291aa2

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF document contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability. This vulnerability allows for the execution of arbitrary code, and the presence of JavaScript streams and unescape calls indicates an attempt to obfuscate malicious code. The ClamAV detection 'Pdf.Exploit.Agent-35905' further confirms the malicious nature of the file. The primary attack vector appears to be exploiting 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` `5e9c9ecbf008fd87f916b8bda076298c9d99ca4ed975f44db2c242ad15a803a4`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	11962 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` `7ce008eb637dc1c49361f0502962bc78e8f245ffb91fa542864f0ee2142b9a27`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	4993 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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