PDF malware analysis — malicious · 7b6d3672f4a4e243

MALICIOUS

PDF

7.4 KB Created: 2009-01-35 62:12:26 Authoring application: Adobe

MD5: 23e9386defa146c83d0fddf788f67ae4 SHA-1: aa9e9032dea62f54e6999280a36688b158a1ebc2 SHA-256: 7b6d3672f4a4e2439d4da67bb7ac3aae9f01e71fd22ace5ab33ce2e5151b9ca1

340 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell 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. These vulnerabilities are leveraged through embedded and obfuscated JavaScript, which is then evaluated. The ClamAV detection of 'Pdf.Dropper.Agent-7275622-0' further confirms its malicious nature as a dropper. The script's primary function appears to be the execution of further malicious code, likely a secondary payload, by exploiting these known PDF reader flaws.

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-7275622-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7275622-0
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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 8

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0032_000.js` `0a88c3b353ba92df707d0755e0678f1503cae9a51af22f8f5c4736cd7db40d42`	pdf-javascript-stream	PDF /JS object 32 at offset 0x420	132 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0034_001.js` `08dec6e6286a32ca1b35b2fd4c2ba98452b5f0ade2d664efd90c12c80d4826b6`	pdf-javascript-stream	PDF /JS object 34 at offset 0x4DE	133 bytes
`javascript_obj0036_002.js` `b048c4d77426d6aac42a35e885b37519a8289f33265a71f774f596ee3a27a0d9`	pdf-javascript-stream	PDF /JS object 36 at offset 0x105	148 bytes
`javascript_obj0038_003.js` `e4f21bdd1dc54bacf8521933aafa24f9d7b2dabfb3b7c6042ac19e6fe93e0864`	pdf-javascript-stream	PDF /JS object 38 at offset 0xC48	170 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0078_004.js` `c91776491ed1e35a6db73625c38795217af3d1db90735c0f9269ad1977382f1c`	pdf-javascript-stream	PDF /JS object 78 at offset 0x7C	43 bytes
`legacy_pdfkit_stage_000.js` `43bd128c3386e7d69cdaba35be1cf3a81c63869bca173e2135298cde33df5052`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x5D1	1634 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `98b14d19131c91ac607781244f30914c075a52a7f07f06cc2f0c96eec8827794`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xD7D	1800 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_002.js` `596ff73dfac9f352626347a1a073501c1a321a229f069cbc038765cfaec74968`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x13EA	2938 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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