PDF malware analysis — malicious · c2231fa44b8ea372

MALICIOUS

PDF

2.2 KB

MD5: 1101758768e098e2e8607ed0f06fa96d SHA-1: 78c5ed65046ba88fc7035da9a461098eb35da231 SHA-256: c2231fa44b8ea37222ff792be10305a6abebf7c76312446de6016f979a674e4c

220 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

This PDF file contains embedded JavaScript that leverages CVE-2009-0927 (Collab.getIcon) and CVE-2008-2992 (util.printf) to execute arbitrary code. The JavaScript is obfuscated and uses eval() to run the deobfuscated code, which is typical for PDF-based exploits. The primary goal appears to be the execution of a second-stage payload, though the specific nature of that payload cannot be determined from the provided evidence.

Heuristics 7

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. (identified after JavaScript deobfuscation)
OpenAction trigger high PDF_OPENACTION

PDF has an /OpenAction — code runs automatically when opened
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.
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_obj0009_000.js` `7c68db45569072ba0a888cb1c91e2465b1fd4aa98341fa89cd4bf7f172bebeae`	pdf-javascript-stream	PDF /JS object 9 at offset 0xBC	15885 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `a3fdb9602fe9af6e0b942fcab0df2f98cd8dbae4848d588f3838418ec1a77b48`	deobfuscated-js	split-join delimiter stripped JavaScript at offset 0xF0	5719 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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