PDF malware analysis — malicious · 81ae3e4979d797cb

MALICIOUS

PDF

2.3 KB

MD5: 3e2b805460d20808b35538729b786336 SHA-1: 42a68cb75c9b9264e3d27bf51acd3889db377e83 SHA-256: 81ae3e4979d797cbc7e769ad10ad062e6250cbdfa7d4f2f7f22a0ab448e4a9aa

238 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that leverages CVE-2009-0927 and CVE-2008-2992 vulnerabilities. The heuristics indicate that the JavaScript is obfuscated and uses eval() to execute, suggesting it's designed to download and run a secondary payload. The extracted artifact 'legacy_pdfkit_stage_000.js' was flagged by ClamAV as 'Pdf.Exploit.Agent-35646', further supporting the exploit delivery. The document body is unreadable, but the technical indicators strongly point to an exploit execution chain.

Heuristics 7

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)
util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992

PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (identified after JavaScript deobfuscation)
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (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_obj0009_000.js` `b24844133556d69fab443fec051bfa1b9c3ab760261e179cc1b8c2156f9ea68e`	pdf-javascript-stream	PDF /JS object 9 at offset 0xBC	20464 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` `e243d18554c2551d4f09aa513a9e8821d5119d9fd21946479cd798e490be7739`	deobfuscated-js	split-join delimiter stripped JavaScript at offset 0xF2	5593 bytes
Detection ClamAV: Pdf.Exploit.Agent-35646 Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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