Malicious PDF — malware analysis report

Static analysis result for SHA-256 553700afda298446…

MALICIOUS

PDF

23.6 KB Created: SĒ“-ó‚âÐiR®Žî­v„Ìh Authoring application: é à±¬×Ё[œÙ2® (via é ó±¬ÝЄ[œÕ2¹.ï)
MD5: 8c876313e6ff7ff3b9f3d50321040fda SHA-1: 918bd3d284f044f06584ad484a89c677f9dac0d4 SHA-256: 553700afda298446bcd35a8f9546ade71b975d1412e1bd4f4b43d2ede7db0a2b
64 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/JScript T1566.001 Phishing: Spearphishing Attachment

The PDF file contains embedded JavaScript, which is used to encrypt the document and hide its malicious payload. This technique is commonly used in phishing attacks to bypass static analysis and deliver malicious content to the user. The presence of JavaScript actions and encrypted content points towards an attempt to conceal malicious code, likely for social engineering purposes.

Heuristics 4

  • Encrypted PDF carries /JavaScript — payload hidden from static analysis high PDF_ENCRYPTED_WITH_JS
    PDF declares /Encrypt and also references an executable trigger (/JavaScript). Document encryption hides the JavaScript body and stream contents from static scanners — combined with auto-execution indicators this is a known evasion pattern used to deliver weaponised JavaScript that the analyst cannot inspect without the decryption key.
  • 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.
  • Optional Content Group with action trigger low PDF_OPTIONAL_CONTENT
    Optional Content Group (layer) co-occurs with an action trigger — content can be selectively hidden from viewers or scanners while the action still fires on open

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0009_000.js
2350b5dee1ead576622d2b28980dca5f7331ec7aeef878e38074d5f927399b06		 pdf-javascript-stream PDF /JS object 9 at offset 0x3C9 21696 bytes

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