PDF malware analysis — malicious · 49d09ac0c2ad2393

MALICIOUS

PDF

12.7 KB

MD5: b14fdc06fd7840f5c69bc7d1cef4b0a6 SHA-1: 5b939e6280e0479135a1cace15fbbdcc41285eb7 SHA-256: 49d09ac0c2ad2393def9fb0e10b08b82adf7456bad44eaa420e22d6d1512a163

138 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded JavaScript, specifically identified as exploiting CVE-2007-5659 via the Collab.collectEmailInfo method. This JavaScript is further deobfuscated into two files, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js. The presence of these deobfuscated JavaScript files and the critical heuristic firings indicate that the primary function of this PDF is to exploit a known vulnerability to execute arbitrary code, likely for downloading and running a subsequent payload. The ClamAV detection further supports its malicious nature.

Heuristics 5

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-36062 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36062
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` `068944f8c011a88ab770b45c6de142b9305a1f515d410204d5eadd9ac2b5bfb3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	373 bytes
`legacy_pdfkit_stage_000.js` `58c1ae5585885733b4791412654ba4097437f80514b1602f44a3b9390ca88620`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12377 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `b3521940a9f52b350f887ee3a1da742d657648ca0a89a2f7077bef6e758184bd`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5168 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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