Malicious PDF — malware analysis report

Static analysis result for SHA-256 e232664113e8267b…

MALICIOUS

PDF

6.0 KB
MD5: a75fa727d8f0084ba3a5af3c2efb15b9 SHA-1: aaeb1cba1f5374ccb0785ee10ca12b4b0c8dde5d SHA-256: e232664113e8267bdfbedca6597674256b0b1ed128c72f8a5fa3e9c2be0e6434
114 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: Malicious File

The PDF file contains embedded JavaScript and a Flash object, both of which are commonly used to exploit vulnerabilities. The embedded JavaScript stream, named 'javascript_obj0017_000.js', contains obfuscated code with eval() calls and String.fromCharCode, indicating it is designed to execute arbitrary code. The presence of a RichMedia (Flash) object further suggests an exploit attempt. The overall pattern points to a malicious PDF designed to deliver a second-stage payload.

Heuristics 7

  • RichMedia (Flash) high PDF_RICHMEDIA
    PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution
  • 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.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • 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.
  • 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.

FilenameKindSourceSize
exploit.swf
09da31fcb002129249bb529a7f84709739a96f62781db5f4c6d9bf6e4308eb15
pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x4D1 102 bytes
javascript_obj0017_000.js
1697d99098bcf934a5516c1aef4beaeafe4a1954e5757420c31568e2d2ed60fc
pdf-javascript-stream PDF /JS object 17 at offset 0x5EB 3162 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s).