PDF malware analysis — malicious · b0e54dd0cc760f62

MALICIOUS

PDF

4.3 KB Created: 2008-09-24 19:47:56 Authoring application: Adobe

MD5: f3cb2b01cceabfd9fab76775b1476ad6 SHA-1: 41a1a020d297e0d30601ef492710a9e0fd909ab2 SHA-256: b0e54dd0cc760f629f7f913808593edfb9a8cde95911e635d607f00e989e8c8a

358 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains multiple critical heuristic firings indicating exploitation of CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659 through embedded JavaScript. The ClamAV detection of 'Pdf.Dropper.Agent-1828894' and the 'Js.Exploit.Shellcode-18' signature on an extracted artifact further confirm its malicious nature. The embedded JavaScript, particularly the deobfuscated 'legacy_pdfkit_stage_000.js', is designed to exploit these vulnerabilities, likely leading to the download and execution of a secondary payload.

Heuristics 9

media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324

PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009. (identified after JavaScript deobfuscation)
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)
ClamAV: Pdf.Dropper.Agent-1828894 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-1828894
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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `a3aed460a1e3372effa08a7ba7baf1469dcd66d29008cf46e7aa9b395a4ab9db`	pdf-javascript-stream	PDF /JS object 6 at offset 0xBFC	102 bytes
`javascript_obj0016_001.js` `a6c6bda49f3d32e9b6e01748966aa5c0c3315dabe2036618638dc46409b753b1`	pdf-javascript-stream	PDF /JS object 16 at offset 0xCA1	463 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0026_002.js` `a449818a5fbf1c8ae348a2c3ac99aa01c3c39e0190ffd78c2dd1b3d32ab4700f`	pdf-javascript-stream	PDF /JS object 26 at offset 0xE17	155 bytes
`legacy_pdfkit_stage_000.js` `341f97b9d1d264cdc216160a8f69b3f7eb42ef618943b84716080438a14e4951`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1BB	6411 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 12 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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