PDF malware analysis — malicious · 3ac445292a178021

MALICIOUS

PDF

3.1 KB

MD5: 0f24b7cbeb77e4d939208348f045ed84 SHA-1: 6d9e1a7d84f39102ffe3616a949bb38bb2d05ad3 SHA-256: 3ac445292a178021aece1614c3c4fd2e3d286da10b428bb1434d5a3428b1e9cb

186 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1190 Exploit Public-Facing Application

The PDF file contains embedded JavaScript and triggers critical heuristics for CVE-2009-0927 (Collab.getIcon) and general PDF obfuscation. The presence of a JavaScript action and an unescape() call indicates the script is likely designed to be executed upon opening the PDF. The extracted JavaScript file, though not detailed here, is a strong indicator of malicious intent, likely to download and execute a second-stage payload.

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. (matched in decompressed stream)
ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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.
Additional-actions dictionary low PDF_AA

PDF defines /AA (Additional Actions) that references an executable action (JS/JavaScript/Launch/SubmitForm) — can auto-trigger on document or widget events. Form-field calc/format/validate/keystroke handlers in legitimate interactive forms commonly fire this, so it is reported as a low-weight signal; weaponised auto-execution is flagged by stronger rules (PDF_OPENACTION, encrypted-with-JS, etc.)
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0005_000.js` `39a300b2e0f52a0fcd254c7183e7ffeb7c2362ce0eb040dd3bf618f4c407c056`	pdf-javascript-stream	PDF /JS object 5 at offset 0x16C	5981 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s).

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