PDF malware analysis — malicious · 89e400ec68c00428

MALICIOUS

PDF

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

MD5: 1da4524f7d898b640dc4006000d0a6a4 SHA-1: ccc69a5a4935ce5c618e0b84e3deebb0f4a183d2 SHA-256: 89e400ec68c00428eae01383b4b90b05ac72cf648528ec578293c16e18fa0f68

368 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file is malicious, as indicated by multiple critical heuristic firings including CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659. These firings suggest the exploitation of known Adobe Reader vulnerabilities through embedded JavaScript. The JavaScript, which uses eval() and unescape() functions, is likely designed to download and execute a secondary payload. The ClamAV detection of Pdf.Dropper.Agent-7280238-0 further supports its role as a dropper.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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: Pdf.Dropper.Agent-7280238-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7280238-0
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` `ffea6e6fdc8fff758dd09c59bf7517a64eff6782d127f2928e5d717c05227478`	pdf-javascript-stream	PDF /JS object 32 at offset 0x420	132 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0034_001.js` `158bbfda4a35bd88b40a7ab6f7e3f42e6c092088a18ae2328d1e693ad98e3ac9`	pdf-javascript-stream	PDF /JS object 34 at offset 0x4DE	133 bytes
`javascript_obj0036_002.js` `b3ffbd65537f14688615fd26e55cf0c86b5d1dd0af2135f6761e0fbf5798c621`	pdf-javascript-stream	PDF /JS object 36 at offset 0x105	148 bytes
`javascript_obj0038_003.js` `1b1225313c4a6d590ce4fe1aba2cec10aeda5b764cf8902a9c1d7fd32fee406d`	pdf-javascript-stream	PDF /JS object 38 at offset 0xC46	170 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0078_004.js` `4851e887bfa884caee11552f2c9ebc6a6dbde2bbf2cbfab5776e996c42aad9db`	pdf-javascript-stream	PDF /JS object 78 at offset 0x7C	43 bytes
`legacy_pdfkit_stage_000.js` `36129aaf8611246ee30926b4052b90f01b947ff01f3eacdbadf6fc19371ae5a4`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x5D1	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` `6b6a5f61b9c1ff0645e8c0e0e6513bb69701731c0f62fee3054caf66b5245575`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xD7B	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` `34c31828fb191590067e7cbee459ec7d88e43941961187572959ddcae97421e5`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x13E7	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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