PDF malware analysis — malicious · c0fb379b526d4fbe

MALICIOUS

PDF

6.6 KB

MD5: 9029f54317a842cbfb3c63397540fc3b SHA-1: d53107cd882010a67acc7ce0dc87cf10935eacb1 SHA-256: c0fb379b526d4fbea7ce06f143b8f4a029e665b76e87818d0f82254427f831c3

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution: Malicious File T1059.001 Command and Scripting Interpreter: PowerShell

The file is a PDF containing embedded JavaScript, which is a common delivery mechanism for exploits. The critical heuristic firing for CVE-2008-2992 indicates the exploitation of a specific vulnerability within the PDF reader. The presence of JavaScript and the ClamAV detection further support its malicious nature. The embedded JavaScript is likely responsible for downloading and executing a second-stage 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. (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.
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_obj0006_000.js` `eadceae3d4a2d2ec705c855e88f9f6cb8d1affada082c1fd6071c00e2ca5dbea`	pdf-javascript-stream	PDF /JS object 6 at offset 0x19F	5418 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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