PDF malware analysis — malicious · 78664517d036969d

MALICIOUS

PDF

10.0 KB

MD5: 5c1932ee507699019a18201112e0a479 SHA-1: 6902bb52dcd1cbeacc6c85dca4c8f142aa9a5ba9 SHA-256: 78664517d036969d0a628b97401c8450c8dc77d5662edcfeb3aa09e91c988aef

356 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1027 Obfuscated Files or Information

The PDF file contains multiple critical heuristic firings indicating exploitation of CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. These vulnerabilities are leveraged through embedded JavaScript, which is further obfuscated using String.fromCharCode and eval(). The deobfuscated JavaScript streams suggest the primary intent is to download and execute a second-stage payload. The extracted file 'deobfuscated.js' likely contains the malicious code.

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)
util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992

PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (identified after JavaScript deobfuscation)
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
Suspicious extracted artifact high 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.
String.fromCharCode medium PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically
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.

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0003_000.js` `553f8cd776a1ee438cd60bdd282a93840ddac343d0c6c3a986005ecdc6a9dcab`	pdf-javascript-stream	PDF /JS object 3 at offset 0x25CF	191 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`info_hex_offset_stage_000.js` `3c464951a3ec58ed1499627346a8dd688503175f6878d75f7a7d5f0801439f20`	deobfuscated-js	PDF /Info subject hex-offset JavaScript (raw, offset=-38) at offset 0x14	4795 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 12 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`deobfuscated.js` `28450b2381e545792aa74207d73d6aff6acdc7a21f6ee990847aca9b06b26da7`	deobfuscated-js	PDF JavaScript deobfuscation pass	386 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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