PDF malware analysis — malicious · f7fd4a0243e6ee0c

MALICIOUS

PDF

4.3 KB

MD5: 1a2d4f10ba0a2f2a3a309ca17eb3bfcc SHA-1: df276dca1ba0496bdd05e1a2a68abe8747e2e3dc SHA-256: f7fd4a0243e6ee0c90e82ef8d02cf39bd787ce26a67cc9e8e01b7adf9f4e34e7

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, which is heavily obfuscated and utilizes eval() 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 strongly suggests the script is designed to download and execute a second-stage payload. No specific family could be identified due to the obfuscation and lack of distinct indicators.

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` `29b13f7e1bb0feea40f4eb3804a456b67d3beadc29a125d689a4f66073c48c27`	pdf-javascript-stream	PDF /JS object 5 at offset 0x107	22758 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` `37df34f504f6ae5d5b62f992cc2346ddc304b8e87bb162c28600c5a2d1893617`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x115	6676 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.