PDF malware analysis — malicious · e912ea0a57e9108d

MALICIOUS

PDF

5.3 KB Created: 5318-13-25 49:65:95 -34:09 Authoring application: Acrobat Editor 8.0 (via Adobe Acrobat 8.1.0)

MD5: ea9065b94ede5f2b5c80744b64a0e739 SHA-1: 6c9df0627268f9ac4487b224ef94aa0086d0483d SHA-256: e912ea0a57e9108df8e085e71033e867af2dc7b0f545f8c38252372b64ed96b6

188 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that utilizes eval() and String.fromCharCode() functions, indicating obfuscation. Critical heuristics confirm the presence of a CVE-2008-2992 exploit targeting Adobe Reader, which decodes and executes a malicious JavaScript payload. ClamAV also identified the file as Pdf.Exploit.Agent-35551. The exploit likely leads to the download and execution of a second-stage payload.

Heuristics 8

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)
ClamAV: Pdf.Exploit.Agent-35551 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35551
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://ns.adobe.com/xap/1.0/
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/pdf/1.3/

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0028_000.js` `da28397fbd00ebe1bed1f7772b00ae122f380f4ca22161d5101a23a85b957fe9`	pdf-javascript-stream	PDF /JS object 28 at offset 0x4D2	3527 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`custom_b64_stage_000.js` `59acd460c63a6ac0e4e281f2c6f096eb17bf3611e6e56f01dd53c375c174ca95`	deobfuscated-js	custom Base64 decoded JavaScript layer 1 (PDF /JS object 28) at offset 0x838	1986 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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