PDF malware analysis — malicious · 0862d9eac967ac4c

MALICIOUS

PDF

2.3 KB

MD5: 94092cbd8e99b2288958aad3fa5d1dd6 SHA-1: c69619e4215a6093401b05a5831a3636384170ca SHA-256: 0862d9eac967ac4cf2e20c51d89707d3489a376944c91d5f218c3a3f61f24b4a

388 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file contains multiple embedded JavaScript streams that exploit several known Adobe Reader vulnerabilities, including CVE-2009-0927 (Collab.getIcon) and CVE-2008-2992 (util.printf). The JavaScript code appears to be obfuscated and is designed to download and execute a secondary payload from the URL 'http://www.example.com/malware.exe'. The ML classifier strongly indicates malicious intent.

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)
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. (matched in decompressed stream)
Pidief-style multi-CVE JavaScript dispatcher critical CVE likely PDF_PIDIEF_MULTI_CVE_DISPATCH

A single JavaScript body branches on app.viewerVersion and invokes two or more of the canonical Reader sinks (Collab.collectEmailInfo, Collab.getIcon, util.printf with a field-width format string). This is the 2009-2010 Pidief.J multi-exploit landing template: a per-version dispatcher that fires the matching CVE chain for whichever Reader version opens the file.
PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
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.
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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.
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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj263984_000.js` `7dd64509dfcd13314f2d912de08601938d371595dc90da115e3f6f4eb97ac530`	pdf-javascript-stream	PDF /JS object 263984 at offset 0x197	6953 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 10 eval/decoder/string-building token(s). Carved artifact contains 3 long base64-like blob(s).
`javascript_obj263985_001.js` `2f2553e59976c002ab24a9f4ef90cda5bdadccb98e3d2f70be71012c46712da1`	pdf-javascript-stream	PDF /JS object 263985 at offset 0x6BC	152 bytes
`javascript_obj263986_002.js` `6320e483234fb7440c4db79c37ab63fff6b8e124f15dfb090e8ab9f9fd1f0f2c`	pdf-javascript-stream	PDF /JS object 263986 at offset 0x78C	509 bytes
`combined_document_js_000.js` `3463d07e0230e00642ed210c3eb7a6e4fe171cc8af26d7d50ca9816f2420768f`	deobfuscated-js	combined document JavaScript streams at offset 0x197	7616 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 10 eval/decoder/string-building token(s). Carved artifact contains 3 long base64-like blob(s).

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