PDF / .TXT malware analysis — malicious · c3f9a1b4bac89f51

MALICIOUS

PDF / .TXT

1.9 KB

MD5: 8e6e0dff98872206b28f99015d21fe9a SHA-1: 5c2eb5dcefadc8351eb246d84e1e5a1715b46bff SHA-256: c3f9a1b4bac89f51c42ef6e39fba592c14ea49ca3b23b2102265c1837a5cccc4

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF document contains embedded JavaScript that utilizes eval() and unescape() functions, indicating obfuscation. A critical heuristic identified the CVE-2009-0927 vulnerability (Collab.getIcon), which is leveraged by the PDF launcher to execute this JavaScript. The script's purpose is to download and execute a second-stage payload, as suggested by the presence of deobfuscated JavaScript and suspicious extracted artifacts. The attack pattern is consistent with a malicious PDF dropper.

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` `eb82ebaa33ef5ca9d3a32e3ff628722a2e10dd2b9454d9dd30223991ca165b4c`	pdf-javascript-stream	PDF /JS object 111611 at offset 0x6CB	277 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` `08889c881571b3ed896bdb12725da8c07ec4159ff7dfb4a659a1819fcb111d6b`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x189	2631 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.