PDF malware analysis — malicious · 880ad7d62ea72bb1

MALICIOUS

PDF

6.6 KB

MD5: ec5763d51db1d3e9d78853f139d1e19d SHA-1: 6e4f90022d380bd5cde3f836aa1862f97019e1c4 SHA-256: 880ad7d62ea72bb1ef46fe35b475e3788ff96dfebce5dc5f5f1e7ebbe97e2ccd

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious JavaScript

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The critical CVE_2008_2992 heuristic firing suggests exploitation of a known PDF vulnerability. The embedded JavaScript, although obfuscated, is likely responsible for the malicious behavior, potentially downloading and executing a second-stage payload. The ClamAV detection further supports the malicious nature of the file.

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` `f7bf9de48a6868d04b43ab4402eb9c549751e96acc96bd2f6c2fbe0bd7905887`	pdf-javascript-stream	PDF /JS object 6 at offset 0x197	5485 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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