PDF malware analysis — malicious · a071e0174002dbb8

MALICIOUS

PDF

4.3 KB

MD5: 4ca6898c3970df6dbd9d8b4cc0ddac3b SHA-1: d5bb46920e26633ca2647dd7e71199d3178026d3 SHA-256: a071e0174002dbb849a7497a9716f940e0c8091c647545831dd369338d91d50e

176 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, indicative of obfuscation. The critical CVE-2008-2992 heuristic firing suggests the PDF launcher concatenates and evaluates decoded JavaScript. This script likely downloads and executes a second-stage payload, as suggested by the extracted JavaScript files and the suspicious nature of the decoded streams.

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)
Suspicious extracted artifact high 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.
String.fromCharCode medium PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically (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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0005_000.js` `7e84497a61c52fc32e039d237453c2990eb353de6ddad96e722fcdd74135ac9a`	pdf-javascript-stream	PDF /JS object 5 at offset 0x107	22431 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` `2757aa0f2f2f222abca37356e24559ded04b479448ac01d8cd317e7a505d8be5`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x115	6615 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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