PDF malware analysis — malicious · 36abf66fdf9807a6

MALICIOUS

PDF

13.1 KB Created: 2011-11-02 19:21:39 +04:00 Authoring application: Adobe Acrobat 10.0 (via Acrobat Web Capture 10.0)

MD5: c92bfd7dcfb944dd3009f0f0c183fb4c SHA-1: c362e59956813d00ae7f9fe2f48aa7b497f088da SHA-256: 36abf66fdf9807a6aa9b9d09e7d3f695e2c0f423e9f79577cddf0ba866f79628

288 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

This PDF file contains embedded JavaScript that leverages multiple CVEs (CVE-2007-5659 and CVE-2008-2992) to exploit vulnerabilities in Adobe Reader. The JavaScript is obfuscated and decoded using a character-table mapping, a common technique for exploit kits. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to download and execute a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 8

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)
Multi-CVE Adobe Reader JavaScript exploit kit critical PDF_ADOBE_READER_MULTI_CVE_JS_KIT

One recovered JavaScript stage contains multiple version-gated Adobe Reader exploit branches. This is stronger evidence than independent API keywords: the PDF is selecting old Reader vulnerabilities by viewer version and running heap-sprayed Acrobat JavaScript exploit paths.
ClamAV: Pdf.Exploit.Agent-36776 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36776
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://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://ns.adobe.com/xap/1.0/
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/pdf/1.3/

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0024_000.js` `5ef88174ce834ef26cda3cdcda962a941fab2d821207112b037e29cee524df1a`	pdf-javascript-stream	PDF /JS object 24 at offset 0x2617	11517 bytes
`array_char_table_stage_000.js` `b6a90d80611806e695e30e125f05d032c4b14baed0b6669dabd5ab9eff8af2aa`	deobfuscated-js	array character-table decoded JavaScript at offset 0x26A4	3933 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).
`icc_00_off000018a6.icc` `653b586c4707574ffcd648ba35494daed2c76ceafcf4c07d315ed961b1dc347f`	pdf-icc-profile	PDF ICC profile at offset 0x18A6	408 bytes
`icc_01_off00001a00.icc` `2b3aa1645779a9e634744faf9b01e9102b0c9b88fd6deced7934df86b949af7e`	pdf-icc-profile	PDF ICC profile at offset 0x1A00	3144 bytes

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