PDF malware analysis — malicious · a1d18f5cc05deeb3

MALICIOUS

PDF

2.0 KB

MD5: 0c5678ec668b5cc6368b03ad562ec27a SHA-1: e5a7c1e78d3deafdd2ff5b23cd1f69bcb664e751 SHA-256: a1d18f5cc05deeb3668bbe635b85f579c671307f5de181d05aa4692777afb8cd

218 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript that is obfuscated using unescape() and eval() functions. The critical heuristic CVE_2009_0927 indicates the exploitation of a known vulnerability in Adobe Reader related to the Collab.getIcon method. This JavaScript is designed to execute arbitrary code, likely to download and run a second-stage payload. The file is detected by ClamAV as Pdf.Exploit.Agent-35930.

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)
ClamAV: Pdf.Exploit.Agent-35930 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35930
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.
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` `f23e505f155bfa9b9f356fa9fddf8d7fcafcc37fc2df3878e575e72c00c819d4`	pdf-javascript-stream	PDF /JS object 111611 at offset 0x6C8	697 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` `01f5f6692aa1678bbfa0a108d8e41bd903c0bf422c5c3f9f4b767e4ab97c45cf`	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).

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