PDF malware analysis — malicious · ba073b547de8da0c

MALICIOUS

PDF

4.2 KB

MD5: fad61c2080fb3c91c56beddcd7a866aa SHA-1: a978e4f98750fd9242d0e5f61aaa6df97acd1630 SHA-256: ba073b547de8da0c45752b1d6f92e4fbbe7bb8e8d21336ad2d7e70424a193638

126 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 vulnerability. The embedded JavaScript is obfuscated and uses eval() and String.fromCharCode(), making its exact function difficult to determine without further deobfuscation. However, the presence of these elements strongly suggests the execution of malicious code.

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)
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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0005_000.js` `e69e9f24dec21787ef305f1a657bbddf313c4843d3eaaf12370eefe1f3dc868a`	pdf-javascript-stream	PDF /JS object 5 at offset 0x107	22496 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` `eb1ca0a57c43b58c58633ee9e82824c680b7b6c47e2cdf3e88988468cb8803db`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x115	6641 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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