PDF malware analysis — malicious · 9bf1cd21762196ff

MALICIOUS

PDF

11.9 KB Created: 2010-07-25 10:32:51

MD5: 10da6cdb1dc6013b99bf45c4c6f03953 SHA-1: 3296fd20f19d846c3dcee1f716056043767e6a62 SHA-256: 9bf1cd21762196ffcc2a5f38d3fc0579048b3d108c1a416cdf3299dc93b6a50a

328 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious File T1059.001 PowerShell

This PDF document exploits multiple known vulnerabilities in Adobe Reader, including CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. The exploitation process involves a JavaScript stager embedded within the PDF's metadata, which is designed to download and execute a second-stage payload. The ML classifier strongly indicates malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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)
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)
PDF /Producer character-range JavaScript stager high PDF_INFO_PRODUCER_CHAR_RANGE_JS_STAGER

PDF metadata hides JavaScript in /Producer as character ranges plus a long numeric index table. The document JavaScript rebuilds an alphabet from those ranges, maps the indexes into characters, and evals the recovered exploit stage. The decoder is bounded and only fires when the recovered stage contains exploit-like Acrobat JavaScript.
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `7772f9c3690d9970c9158f78f526e319a81d622d0247bd34223b8c16309779dc`	pdf-javascript-stream	PDF /JS object 7 at offset 0x2C33	474 bytes
`javascript_obj0007_001.js` `fe0ce034ec07f0867f3f1839369f707bcfc70582f146dd1ab1926ee55c39bd0b`	pdf-javascript-stream	PDF /JS object 7 at offset 0x2C33	102 bytes
`producer_char_range_stage_000.js` `a444fe606e05e9740e215bf670def5e459629edc7d3d94321b7f62d4a39f78ee`	deobfuscated-js	PDF /Info Producer char-range indexed JavaScript at offset 0x17B	3621 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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