PDF malware analysis — malicious · 8cd44872be0efe26

MALICIOUS

PDF

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

MD5: 73426513589c867489646cf0eceba750 SHA-1: 29bcf9536cac59ee732c475f703b8e931ea51fdd SHA-256: 8cd44872be0efe26ac598a4d37b3ebc6dbd34040c3c510ccc8565f1fe2b4aa07

358 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file contains multiple critical heuristic firings indicating exploitation of CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659. These vulnerabilities are leveraged to execute embedded JavaScript, which is further obfuscated and likely responsible for downloading and executing a second-stage payload. ClamAV detections of 'Pdf.Dropper.Agent-1828845' and 'Js.Exploit.Shellcode-18' on an extracted artifact corroborate the malicious nature and dropper functionality.

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-1828845 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-1828845
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` `11864702b12a129aa5f62758ac17f96a2d32ff5efd4f4f168d4c1c6e36e093ea`	pdf-javascript-stream	PDF /JS object 6 at offset 0xC10	96 bytes
`javascript_obj0016_001.js` `25024dffd77eddbd6ac570611a66630203393f1e54a13c7ed359a08d84c736b1`	pdf-javascript-stream	PDF /JS object 16 at offset 0xCB1	437 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0026_002.js` `59bfc80efb4b98cca9d262ef77d382ee2486499c4982e8f450aa155f39b902b9`	pdf-javascript-stream	PDF /JS object 26 at offset 0xE18	141 bytes
`legacy_pdfkit_stage_000.js` `7885a25479c7a3011a8cb4b1933d30c416bbf65f584c4bbcf3b90aa9e68b07d3`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1BB	6435 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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