PDF malware analysis — malicious · ef0b15a14ea686ca

MALICIOUS

PDF

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

MD5: 7708c3f70e37acc0330307b2298e2788 SHA-1: 3f1a849b134f65c8ab4883b978eb6874d16bc1c8 SHA-256: ef0b15a14ea686ca806b826f9833eeab2576ead01fc46600cc6dd69193038585

278 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

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, including the use of eval() and unescape() functions. The script's likely intent is to download and execute a secondary payload, as suggested by the presence of deobfuscated JavaScript stages. The document body is heavily obfuscated and does not provide direct clues to the lure.

Heuristics 8

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)
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` `a42e723cc906cd44a77ad46988207e6695b9ddc720a9663ce30f1069b64753dc`	pdf-javascript-stream	PDF /JS object 32 at offset 0x427	134 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0034_001.js` `1e91e939077c82437bc9c6991b788e547a85f0ad0a01db0a2ee5953b563004f1`	pdf-javascript-stream	PDF /JS object 34 at offset 0x4E7	139 bytes
`javascript_obj0036_002.js` `9cf88c963a56cfef5ae80a9ae32a6a3518e858cbada090a7c61e5c808c4aebc5`	pdf-javascript-stream	PDF /JS object 36 at offset 0x109	158 bytes
`javascript_obj0038_003.js` `fe4d1042b6c142f4d5b2dbe52e4f6e2e6d84c2a48a8b4e2244143760826dec09`	pdf-javascript-stream	PDF /JS object 38 at offset 0xC55	178 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0078_004.js` `baf50e9a4e974199c0440d3c86d4e3ebaf2ad6102ff9fccb66a2cd47f380a9c6`	pdf-javascript-stream	PDF /JS object 78 at offset 0x7C	47 bytes
`legacy_pdfkit_stage_000.js` `07ec46937a756ad781ef72fd75f59a7cdcd2bb4990234d529a4c39410b2e0558`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x5DE	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` `04d806bc6a965add855a14160868ed7e1a2dd91ed04eb146e6cc39a53c920aaf`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xD91	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` `76baa113d28f2f5d36d66a74eea3e45ee1c209c9da680c3842376e9d215b67cc`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x13FE	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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