PDF malware analysis — malicious · cd63adefe9032553

MALICIOUS

PDF

2.8 KB

MD5: 8d54653f5c0327eac271452e0deec700 SHA-1: d64a5f2dba957e785ce4db7428a101e7820ff58d SHA-256: cd63adefe903255307908e4b9d2a3328d0edb459fcb89acd970c52a94fda2741

226 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Shell Scripting: JavaScript T1204.001 Malicious Link/URL: Malicious Link T1204.002 Malicious Link/URL: Malicious File

This PDF file contains embedded JavaScript that leverages CVE-2009-0927 and CVE-2007-5659 vulnerabilities. The JavaScript uses eval() and unescape() functions, indicating an attempt to deobfuscate and execute malicious code. The primary intent appears to be exploiting these known PDF reader vulnerabilities to achieve arbitrary code execution.

Heuristics 8

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)
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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_obj0008_000.js` `433d6141b5fc932a52d94051061c1f7566cbde37bb51ce636d76e20ed4ab2bf6`	pdf-javascript-stream	PDF /JS object 8 at offset 0x148	297 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `b80818a5072376fda3dc34b752f0763ce431305b871ec640c644459411108071`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x248	4612 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 9 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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