Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b9c7d2870b82dcf…

MALICIOUS

PDF

8.2 KB
MD5: d629feb25e637cd230eff5a45b4f60cc SHA-1: 060952146fe5fa0197de1160a6b7341dfa9204b8 SHA-256: 9b9c7d2870b82dcf3e23c5619f2964a58a9fa9e88fb38b14807d5962fa4da7a3
64 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of a PDF_EVAL heuristic firing suggests that the JavaScript code is being executed, likely to download and run a second-stage payload. The PDF_FROMCHARCODE heuristic further supports the obfuscation of JavaScript code. No specific malware family could be identified, and no malicious URLs or hashes were extracted.

Heuristics 5

  • 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. (matched inside decoded stream)
  • 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. (matched inside decoded stream)
  • 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)
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/pdf/1.3/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00000489.bin
8505f10ea09728a0b8061e075f08305459e5e3c53453a51cfcdb1922310e1722		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x489 2438 bytes
objstm_0025_00.bin
81321cf448f1fddbf6c9a98f4506a2ab2d60c265fe363e5f89d51e061a9ebe86		 pdf-objstm-decoded PDF /ObjStm 25 0 obj (inflated) 546 bytes

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