PDF malware analysis — malicious · db806696b808ae5d

MALICIOUS

PDF

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

MD5: d789419eda22a39cdf5e339d44035431 SHA-1: 7b59f749c991660fec376e958c722c258e33dd95 SHA-256: db806696b808ae5db7e2ce4a24bba766378da2ef4a9df1fb1c1b66f945bff0ee

278 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript 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, including the use of eval() and unescape() functions. The primary intent appears to be the execution of arbitrary code, likely for downloading and executing a second-stage payload. No specific family could be identified.

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` `70b69e31200fefdc68e9c80f2f1b369a4a84210108f4b2e3236982d002ed23cc`	pdf-javascript-stream	PDF /JS object 32 at offset 0x424	133 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0034_001.js` `42be62806bcdef3d92a0488ea84f9c4f710f9a9e345ea69311ff4af508b56856`	pdf-javascript-stream	PDF /JS object 34 at offset 0x4E3	136 bytes
`javascript_obj0036_002.js` `a9f5b65c9b45e2754cf7d8fddc2b67cef5df12de029469904aba3d5204c08c7e`	pdf-javascript-stream	PDF /JS object 36 at offset 0x107	153 bytes
`javascript_obj0038_003.js` `8ac573a72c4c9ec8de56b760e0975b5d7721fcd5ff30d422bd399b5c887b77c3`	pdf-javascript-stream	PDF /JS object 38 at offset 0xC50	174 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0078_004.js` `5889c75d8e06f934d9cc930da7053fc773028a453ebea96aafb7c22a266b1815`	pdf-javascript-stream	PDF /JS object 78 at offset 0x7C	45 bytes
`legacy_pdfkit_stage_000.js` `aa904c45c1004b98065fa16086914c167bf92e6c7de6833d568e9c01b9610e41`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x5D8	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` `fc52208ac8694ef228d091ab705d065caa6ebc5c5df61f8c192d6811c87517c3`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xD89	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` `917627222b8bffbabe145970f4d3d1f01827889fff9dfd75bfc80f3645075b11`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x13F5	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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