PDF malware analysis — malicious · d906be35bf5ba541

MALICIOUS

PDF

5.8 KB Created: 2008-09-24 19:47:56 Authoring application: Adobe (via Notepad)

MD5: 0f5d1f1314f3e52c2ebe09f4b9f65762 SHA-1: 4f279c07df207ba5a2392aded47edc037f9c2003 SHA-256: d906be35bf5ba541ac2d50f65eb2fc8e5313e60e2622a7b37f620e41961c619f

358 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link or Document: User Execution of Malicious Document T1204.002 Malicious Link or Document: User Execution of Malicious Link

This PDF file is malicious, leveraging multiple critical vulnerabilities (CVE-2009-0927, CVE-2007-5659, CVE-2008-2992) related to JavaScript execution within Adobe Reader. The embedded JavaScript, particularly in the deobfuscated stages, is designed to exploit these flaws. The primary intent appears to be the execution of a second-stage payload, as indicated by the ClamAV detection of 'Js.Exploit.Shellcode-18' on extracted artifacts. The specific exploit kit or final payload is not identifiable from the provided evidence.

Heuristics 9

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)
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)
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: Pdf.Exploit.Agent-35931 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35931
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `bde501f8d7c74b0b90b93649c4acd610c2f4e8dc2289cd1ecb66cb125056d3c2`	pdf-javascript-stream	PDF /JS object 6 at offset 0x134B	1031 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `151b494b5c0b006bf57adc5968198971b0e9a884edf0da8477243efaea01935f`	deobfuscated-js	metadata placeholder percent-decoded JavaScript at offset 0x16E	4899 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 9 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `c91042c42d96d8c711b8e664b1e0d5fab0840300bd0a1ecff6d2b6f591878b55`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x16E	4895 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 9 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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