PDF malware analysis — malicious · 200eab24152847ff

MALICIOUS

PDF

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

MD5: a9979e856953bc6855c5ef89810d6405 SHA-1: da8eabbbc03c737e336fb1f3411c1cdad884493c SHA-256: 200eab24152847ff940399b90faf5d169e8ed17c6077738ff4ac514f7952b946

338 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 obfuscated JavaScript, which in turn is detected by ClamAV as Js.Exploit.Shellcode-18. The JavaScript likely downloads and executes a secondary payload, as suggested by the deobfuscated script and the nature of the exploits.

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 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)
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 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0032_000.js` `3ebec7c543bdbd669a4ed6dc3f37b148ff5edcf719077a440da9f2f636d21f7b`	pdf-javascript-stream	PDF /JS object 32 at offset 0xCA2	139 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0034_001.js` `fc472be8a0374530615356f437f9e0b7dd6218979a617704f4fcd796b9e66385`	pdf-javascript-stream	PDF /JS object 34 at offset 0xD73	144 bytes
`javascript_obj0036_002.js` `4f8f8185966e04e83bbcf17d3985a2182a59988d6aa60fc2cae1c6e653d5afb3`	pdf-javascript-stream	PDF /JS object 36 at offset 0xEDB	120 bytes
`javascript_obj0038_003.js` `8c57f22785485141a97a403dd8cfb344c98e53aa7ba9c27689b49ccf45cca8b6`	pdf-javascript-stream	PDF /JS object 38 at offset 0xFA8	157 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0078_004.js` `bc8faa385ef009b1d1b34651903412c5e87a38b60c23dc36a13b7af399bd41f9`	pdf-javascript-stream	PDF /JS object 78 at offset 0xE44	32 bytes
`legacy_pdfkit_stage_000.js` `75b2d4a88f9acd8e7fb79ef0c3a58a9dbbb6cddc39a35a844e61e2968b0c1d87`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x20C	6459 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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