PDF / .TXT malware analysis — malicious · d0cb20eaf386d15e

MALICIOUS

PDF / .TXT

1.9 KB

MD5: 46ee96ce23d71543ee22ee4f75c59d37 SHA-1: a76aa1eab37aff523a251e803c2a265503b691df SHA-256: d0cb20eaf386d15e108e7d6fb315ebc0778630deff50fbb4b4d7209c40305611

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF sample contains obfuscated JavaScript that leverages the CVE-2009-0927 vulnerability (Collab.getIcon). The JavaScript is deobfuscated and uses eval() and unescape() functions, indicating it's designed to execute arbitrary code. The primary attack vector appears to be exploiting this known PDF vulnerability to achieve code execution.

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)
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_obj111611_000.js` `0c76cda798ef77d3534d0ecfe9b37e2225dfe992b937194fe3020d8fc0ba3acc`	pdf-javascript-stream	PDF /JS object 111611 at offset 0x6CE	295 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` `3d0c6f3695b388bc86fe2b04456385811d20522b40493c4bf0c7a65d993e6d08`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x189	2637 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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