PDF malware analysis — malicious · d2c8836ee3bfcd60

MALICIOUS

PDF

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

MD5: 487c4c84c50684df9526a896bf15e21b SHA-1: ca0db1ab9af6e758cd79c1fb8089797c5f1af5c0 SHA-256: d2c8836ee3bfcd60d0875b9c364ec2f688c9fe8832f6b18886cd8a767b577dc2

338 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file exhibits multiple critical heuristic firings related to known vulnerabilities (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659) that are used to execute embedded JavaScript. The JavaScript streams, particularly the deobfuscated ones, indicate the execution of malicious code. The ClamAV detection of 'Pdf.Dropper.Agent-7307683-0' further supports its malicious nature as a dropper. The primary function appears to be exploiting these vulnerabilities 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-7307683-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7307683-0
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` `758c2552cb49184ecb266edbeb0d374fed066d61ced71e33b7ce27eb68edb737`	pdf-javascript-stream	PDF /JS object 32 at offset 0x42A	135 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0034_001.js` `9b5558288ed0af695c0be4e8d1f232c7581a1e914f20b38da2a56dedbdc33d13`	pdf-javascript-stream	PDF /JS object 34 at offset 0x4EB	142 bytes
`javascript_obj0036_002.js` `aec50607017e2b0bef4356e770e5131aa488050842f35fc70f292ef08c45b2f4`	pdf-javascript-stream	PDF /JS object 36 at offset 0x10B	163 bytes
`javascript_obj0038_003.js` `5acf031fa19e54982f78fae50439f8975ed168b2a43a456acf6bbe7e8d40b087`	pdf-javascript-stream	PDF /JS object 38 at offset 0xC5D	182 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0078_004.js` `a5334892302e06e26a6feae233e38f81264ea0a6e4d636bafd153e1c4418021e`	pdf-javascript-stream	PDF /JS object 78 at offset 0x7C	49 bytes
`legacy_pdfkit_stage_000.js` `bcd780c073c328b0e89b6580ac47706ac3f0517d07d137ceb5daef51d45c8a47`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x5E5	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` `507b08685ea9169fb9b632c4e4282e5994fc580495423410e4e3cadbea969b98`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xD9D	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` `5e42e53dae34947ae43ddcdd14a3de9ecd60c191021c639b51acc2ad58788788`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1409	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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