PDF malware analysis — malicious · e60063c1eb1e8d44

MALICIOUS

PDF

4.4 KB

MD5: 3d0bfec0e9feb972a83001534a8f0f7f SHA-1: 5015388dd67ae8bf77bd36a6d59ca9e9a8ad2ea5 SHA-256: e60063c1eb1e8d44c93e763f4b011f7c1dae6928587a4819c937109f75804f61

176 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The critical CVE_2008_2992 firing suggests the exploitation of a known PDF vulnerability. The embedded JavaScript, specifically the 'numeric_charcode_stage_000.js' artifact, likely decodes and executes a second-stage payload. The presence of eval() and String.fromCharCode() calls within the JavaScript stream points towards obfuscation techniques used to hide the malicious payload.

Heuristics 6

util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992

PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (identified after JavaScript deobfuscation)
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
Suspicious extracted artifact high 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.
String.fromCharCode medium PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically (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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0005_000.js` `6bc115510fc01402867c08e8cd3f2749413b28463a4cf05fa8951c910a2beb57`	pdf-javascript-stream	PDF /JS object 5 at offset 0x107	23263 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`numeric_charcode_stage_000.js` `6d7913cc8406284af4d27120b36c13e460969fea0c62a413701ba43393183bc8`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x115	6859 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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