PDF malware analysis — malicious · 8af66aee0d2ef719

MALICIOUS

PDF

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

MD5: 157fe5ea7040cd8d7470802a4afaebe8 SHA-1: aab8ca4fe03b1be5661cae942bb30fadbf2a0469 SHA-256: 8af66aee0d2ef719045977788470b2f901ed9d35dd360fdffb7914245b16537c

278 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 uses functions like eval() and unescape() to execute malicious code. The primary intent appears to be downloading and executing a second-stage payload, as suggested by the presence of deobfuscated JavaScript streams.

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` `0fb82e623447dfb43502fa16e0c53a8c1e87f1df1c15601cb8c0f7f5d9fc54fe`	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` `1990fb16d9cb6effbed7fe2ebeb269077b4e8a5ce40b044cfaf7325bd5ffeeff`	pdf-javascript-stream	PDF /JS object 34 at offset 0x4E7	139 bytes
`javascript_obj0036_002.js` `82528d54fa5a487656f0428fc4c72355be5af451ae671e41dd0db64afff2788b`	pdf-javascript-stream	PDF /JS object 36 at offset 0x109	158 bytes
`javascript_obj0038_003.js` `f06d39f0f7e4c9fbe532b32e206d146fd556d48bfe93a063c71e17868ce1a904`	pdf-javascript-stream	PDF /JS object 38 at offset 0xC57	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` `471c8f500bbfafc4e915fe45ab6519a34ee00dd5ffb718cfa046e72ccab2d660`	pdf-javascript-stream	PDF /JS object 78 at offset 0x7C	47 bytes
`legacy_pdfkit_stage_000.js` `3b20ad0095b7bb0880870978a372723105ff479d7d7718411cf46e74718f73f2`	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` `4bd454ca6cddb52c98517b1d7bda33f1f7df361b4ae0c755b876f57ea009f7e5`	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` `5e480991e5171419bfedb1682d9039ec92a4f5391319dc0f0fc30a2fbfae1ac4`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x13FF	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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