PDF malware analysis — malicious · 9e2da151909b3d04

MALICIOUS

PDF

2.3 KB

MD5: fc59a45569ebc7f94dae4b30981e87b8 SHA-1: d029e52f739ba06000477dc7e463470e20874337 SHA-256: 9e2da151909b3d04c6a54903db0f3c31eaca8b555b60c7ea4dcd64ef64a18057

226 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains obfuscated JavaScript that utilizes `eval()` and `unescape()` functions, indicative of exploit code. Specifically, the `CVE_2009_0927` heuristic firing points to the exploitation of a known vulnerability in Adobe Reader related to the `Collab.getIcon` method. The embedded JavaScript is designed to download and execute a secondary payload, as suggested by the `EXTRACTED_FILE_STATIC_TRIAGE` heuristic. The reconstructed JavaScript string is too complex to reliably reconstruct a specific URL or command, but the overall pattern is clear.

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)
ClamAV: Pdf.Exploit.Agent-36082 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36082
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` `772da696bdb365f3f1eb4ea6af881baad391be62f3591b19f2f9827fcc4c9b53`	pdf-javascript-stream	PDF /JS object 111611 at offset 0x83C	479 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` `629bd977b7bd3d1a6d26f2aec1f951d60cc61aa143d32d69646d9f4a08477ace`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x189	2619 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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