PDF malware analysis — malicious · 1c0fb05d49d31491

MALICIOUS

PDF

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

MD5: 55abe72f6bd25017d4ee1ad07c6169b3 SHA-1: 95acb69a553664b285d03c2b7e5ec1f7fcf46e89 SHA-256: 1c0fb05d49d3149161bb6e2d2161c4a26a67a8a6569db9a6e83ae478e33edb5c

338 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 JavaScript, which is obfuscated and uses `eval()` and `unescape()` functions. The ClamAV detection of 'Pdf.Dropper.Agent-7235779-0' further confirms its malicious nature as a dropper. The primary function appears to be the execution of malicious JavaScript to download and execute a secondary payload.

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-7235779-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7235779-0
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` `e1c6f776c787d447b916e9fc4eb325126b74ca3deda134163dcc760e4edf393f`	pdf-javascript-stream	PDF /JS object 32 at offset 0x41D	131 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0034_001.js` `3825c4bbfd7f899fb98f802ab70a0684ceb979aa3d341e6e0f83926a07b8e2c1`	pdf-javascript-stream	PDF /JS object 34 at offset 0x4DA	130 bytes
`javascript_obj0036_002.js` `2605a12ae59cfe9d835cc6e1dd7eaf377a970f0184f3802fdee3c82a76016c90`	pdf-javascript-stream	PDF /JS object 36 at offset 0x103	143 bytes
`javascript_obj0038_003.js` `838fc3a8679988a9010ee598045de498e2b6dc2c517b0534182580e9de59b6a3`	pdf-javascript-stream	PDF /JS object 38 at offset 0xC3F	166 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0078_004.js` `233d6a0b9599c0db0a82aceac90f7c99b8ba12c8c37ec4b3d7d3aed7c0919596`	pdf-javascript-stream	PDF /JS object 78 at offset 0x7C	41 bytes
`legacy_pdfkit_stage_000.js` `05ae9bc83c0a860b2b21fcd4d0e17d4917111faf1ef255508b46796fcde9d8e0`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x5CA	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` `d457eadf74b51a8e9df12ca7d1a2418127070fd79381ec8ffd5422aa32caeaa2`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xD70	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` `b14bad18ce240f7b851dca0895ccc1c959beb24a4141a03d038cd97a829cc3e2`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x13DB	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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