PDF malware analysis — malicious · 268779bae596f8fa

MALICIOUS

PDF

5.5 KB Created: 2008-09-24 19:47:56 Authoring application: Adobe (via Notepad)

MD5: db8743d9730ea543024e7c8e453f7640 SHA-1: 1ea00ba19df155bb3ba43b908394d22cc2bb24e0 SHA-256: 268779bae596f8fa648d796c52ee577f54dc1707065509ccdaad357d4c19d1b6

332 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF file contains multiple critical heuristic firings indicating it is an exploit kit targeting Adobe Reader. Specifically, it leverages CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992 by decoding and executing JavaScript found in the document's info/trailer section. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector is the exploitation of these known Adobe Reader vulnerabilities.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 9

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)
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.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (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.
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser exited 1. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `2eabde6e20057c4a4fc98e553518f51d3981d8267adee1805470ee6e9c0fd71a`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1342	140 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`info_trailer_percent_stage_000.js` `4f19168c76f36dc472b46b2d0fb9ede70cd97fe0cf6734feeeca81a5cb4362bc`	deobfuscated-js	Info /Trailer percent-placeholder decoded JavaScript (object 5, info object 9) at offset 0x136	2672 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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