PDF malware analysis — malicious · 463254452d61d982

MALICIOUS

PDF

9.2 KB

MD5: 48b156b424c3d65b8e12ed9b0f73a561 SHA-1: 5ffb448f67b322381cdfa72630c0f8ad0db52a91 SHA-256: 463254452d61d98280041101c0a7ee7613a697bb4c49718cb5508cdfbbcf7676

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. A critical finding is the exploitation of CVE-2007-5659 via the Collab.collectEmailInfo method, which is used to decode and execute JavaScript. This JavaScript is likely responsible for downloading and executing a second-stage payload, as suggested by the ClamAV detection of Pdf.Exploit.Agent-35905 and the presence of deobfuscated JavaScript streams. The document body is unreadable, but the script behavior points to a malicious downloader.

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` `a6de03a7b8defcdb21b91d60441cc54ee811425e892a7fbe0c430b1dffc32957`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	11686 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` `54523c41eb37fef4e899b35e6a28674059fb85c5ff6a3b8adfdfd6f8a6f62f3a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	4884 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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