PDF malware analysis — malicious · afd22fb3b5223fb2

MALICIOUS

PDF

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

MD5: d53cdc21f68349cce063c8ba56ea13e3 SHA-1: 9ec2efd3d543e2e5dd6229f8e4184389ca76ba93 SHA-256: afd22fb3b5223fb20769e674ee15638ec0f547573f4ff775f94e99c67a6ca611

278 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.001 Malicious Link 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 JavaScript, which is obfuscated and uses `eval()` and `unescape()` functions. The script's likely intent is to download and execute a secondary payload, a common technique for initial access.

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` `5d7882b25c0d8504aae250d40158db479f16fe265ee4124b10c6fe2bfee18ae4`	pdf-javascript-stream	PDF /JS object 32 at offset 0x42D	136 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0034_001.js` `c831fa6e6e36284af9c3fad49edd2d216999c55f5ed91c10677a399ccd3a3df7`	pdf-javascript-stream	PDF /JS object 34 at offset 0x4EF	145 bytes
`javascript_obj0036_002.js` `12ff3756bdf6095a15f6b65c54a5a736d634b98a1b038634f5fb8fbc09fb0c35`	pdf-javascript-stream	PDF /JS object 36 at offset 0x10D	168 bytes
`javascript_obj0038_003.js` `dbbc55c5ec1ea3b58337411f66e02669ffa32d754b1cfc36faf86ce6c7962ac3`	pdf-javascript-stream	PDF /JS object 38 at offset 0xC60	186 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0078_004.js` `2c27bd7c65dc9599d8e5b04d8fcc879888a411c207b533d22a9b22515b56840d`	pdf-javascript-stream	PDF /JS object 78 at offset 0x7C	51 bytes
`legacy_pdfkit_stage_000.js` `88fd2ea7701e9ece243f3d3bf0975ad9fb7d60a7c8823fb5fcc897293314dd6a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x5EB	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` `650dce10123efbbc6a14a0512f39249cae67c1bc407bc48495510d45f073ebbf`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xDA3	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` `8b0871eb12c6dff4d2f7fd581f62bdf07cd653af33a8374ccd0bd8e19bd5ad1c`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x140F	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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