PDF malware analysis — malicious · 2570578bfb18a66a

MALICIOUS

PDF

7.9 KB

MD5: 0273b27bb36a699b510dd9ed35a6ec6d SHA-1: 7e8db83ddda7c581eddd8a0f9ec129b8a932a7af SHA-256: 2570578bfb18a66a49acfd46df4fdc9352ea4c356c1f9ce5025a1fdaa0122e52

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that is triggered by the OpenAction, utilizing the CVE-2009-0927 vulnerability (Collab.getIcon). The script is obfuscated but contains eval() and unescape() calls, indicating it's designed to download and execute a secondary payload. The presence of 'Pdf.Exploit.Agent-35649' from ClamAV further confirms its malicious nature. The extracted JavaScript files, 'javascript_obj0007_000.js' and 'legacy_pdfkit_stage_000.js', are artifacts of this exploit.

Heuristics 8

Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927

PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (identified after JavaScript deobfuscation)
ClamAV: Pdf.Exploit.Agent-35649 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35649
OpenAction trigger high PDF_OPENACTION

PDF has an /OpenAction — code runs automatically when opened
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `a93a4538ff4c7f4c986a8725b9ba5cbada7d79609837eab5317836667f1ee083`	pdf-javascript-stream	PDF /JS object 7 at offset 0x355	6580 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `e02e2a3bae5c73bf215cd72464cd0cd24899c02b4725be7065c7303db8f7b64c`	deobfuscated-js	string-concatenation normalized Acrobat API aliases at offset 0x355	276 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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