PDF malware analysis — malicious · 6db9ffa8ec3699f3

MALICIOUS

PDF

2.3 KB

MD5: 00045739864b92b527281b02787fadf9 SHA-1: ce18299b595ce882e120d3222a9be8f72fe3fd80 SHA-256: 6db9ffa8ec3699f385b61080e7290ee50d2b93ac9aade8b6767db7f808151c59

448 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains multiple JavaScript streams that trigger known Adobe Reader vulnerabilities, including CVE-2009-0927 (Collab.getIcon) and CVE-2008-2992 (util.printf). The deobfuscated JavaScript appears to construct a URL, likely for downloading a second-stage payload. The presence of these exploit techniques and the dropper classification strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 10

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.
ClamAV: Pdf.Dropper.Agent-7270454-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7270454-0
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` `bf182d8925ce75d55ca5d8b8794427c3af0356444b38cc1758cb64b3293bf250`	pdf-javascript-stream	PDF /JS object 263984 at offset 0x197	6988 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` `f966821d25843be9e5f33514b0abf0ac91137fe7b3a2d766f13159d0cc818769`	pdf-javascript-stream	PDF /JS object 263985 at offset 0x6B9	157 bytes
`javascript_obj263986_002.js` `25e21c0b50ca54b09ef7410277e89078dd55f05a704a52399b47eca61d794496`	pdf-javascript-stream	PDF /JS object 263986 at offset 0x78B	521 bytes
`combined_document_js_000.js` `cd54b8c71022bde88768247ee5323c0fa7cbcbe7d6a21fa0055c41ea0aa15182`	deobfuscated-js	combined document JavaScript streams at offset 0x197	7668 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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