PDF malware analysis — malicious · 47a9e35717d5f431

MALICIOUS

PDF

4.2 KB

MD5: d4c4fde6c8ec2c6bc1128aafac37a0a6 SHA-1: 082d3be42022efa880c300c31c8a0cf0b6155f23 SHA-256: 47a9e35717d5f43128384091cfe4c9b506dbe78990632a34af71b7ab8c746400

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, which is executed using the eval() function and String.fromCharCode. The critical CVE-2008-2992 heuristic indicates that the PDF launcher concatenates info fields, extracts characters at a fixed stride, and evaluates the result. This suggests the sample is designed to exploit this vulnerability to run malicious code. No specific family could be identified.

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` `692d489c8063841257443435f3df6495e5caa6984c683ace211cf141644d4604`	pdf-javascript-stream	PDF /JS object 5 at offset 0x107	21402 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` `d4349d9ed90410f3a8b927a2caa468e0a6e37228c1d924e478936e31172f0241`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x115	6301 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).

Open this report in the interactive analyzer, or submit your own file for analysis.