PDF malware analysis — malicious · 733aa10080084819

MALICIOUS

PDF

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

MD5: 787ab1dbf1541c02b811b7febc536568 SHA-1: 90fa54f0decfc6977009504c7f1106655150a6d8 SHA-256: 733aa10080084819b29806de88503c770f9539529ea457ce8c5160f01491b834

270 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF sample contains multiple JavaScript streams that exploit known vulnerabilities (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659) to achieve code execution. The embedded JavaScript attempts to download a second-stage payload from the URL http://witedirect.com/parent7/exe.php?exp=pdf, which is a common technique for delivering further malicious content.

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)
PDF JavaScript shellcode contains an embedded download URL high PDF_JS_SHELLCODE_DOWNLOAD_URL

Decoded PDF JavaScript shellcode contains a hardcoded http(s) URL stored as little-endian %uXXXX Unicode escapes. Reader exploit shellcode embeds the second-stage fetch URL this way and pulls it down with a urlmon/URLDownloadToFile-style download-and-execute (commodity downloader behaviour rather than a specific Acrobat CVE).
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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://witedirect.com/parent7/exe.php?exp=pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0032_000.js` `55cf9f44e1e6984ad768085119c8e3e229f9d39072b2880932404b1a64f08aca`	pdf-javascript-stream	PDF /JS object 32 at offset 0x35B	303 bytes
`javascript_obj0034_001.js` `439c82ed84ec4cd1bc64f514e6a7ffd648ce1596aacf465b51b5155b35582236`	pdf-javascript-stream	PDF /JS object 34 at offset 0x461	411 bytes
`javascript_obj0036_002.js` `9907b06e7d80189c049d191301f2e41a6efe70bb250d5d7946223f9e6517e546`	pdf-javascript-stream	PDF /JS object 36 at offset 0x7C	272 bytes
`legacy_pdfkit_stage_000.js` `91be26a3bf133dc3029bb87d5ef62aa711d3453642ddd7fd9345ec23c910ee6c`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x5B2	1646 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` `13c62319adb3cc8074e3213806d6dcefd470745523b2bdeb321cbd45f3894e45`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xBBB	1806 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` `102d5567e3403a6fe098fa4f3ecfaaef8288a033df2a7f2ce93f0cb8d823f6f3`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1199	2950 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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