PDF malware analysis — malicious · 4ef6d9bbff6001e3

MALICIOUS

PDF

2.2 KB

MD5: 650f13322d08334d80fa79d42095ddac SHA-1: 584add44149e98bd9a250482530723aa1371c720 SHA-256: 4ef6d9bbff6001e31b3e6ee00350390047470b7cf69e1bd82cdbd55a573d88b2

238 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that leverages critical vulnerabilities CVE-2009-0927 (Collab.getIcon) and CVE-2008-2992 (util.printf). The JavaScript is obfuscated and uses eval() to execute, indicating it's designed to download and run a secondary payload. The ClamAV detection 'Pdf.Exploit.Agent-35646' further supports this assessment. No specific family could be identified, but the attack pattern is consistent with PDF-based exploit delivery.

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` `048fcfa807afdbdb806b4f2ff989200e4a7089b93d95b5a1e91c8763f8c6e5a9`	pdf-javascript-stream	PDF /JS object 9 at offset 0xBC	15523 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` `ceb425607ede500d6f17568ee366287f44ab20c7a60762050b49a5be76ba0bb9`	deobfuscated-js	split-join delimiter stripped JavaScript at offset 0x103	5609 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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