Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae59e56fccc299a5…

MALICIOUS

PDF

40.3 KB Created: 2021-04-28 10:25:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 781aa4de3be3573acfccacf5ffdad9f4 SHA-1: 9ad770bd903d1e2352ea2f351b952f285b81a474 SHA-256: ae59e56fccc299a5150c35581aaa893579e4560c93d7bd883187d76d4f2f50fc
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to free Roblox currency and includes multiple embedded URLs pointing to potentially malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of a 'password-protected archive' lure suggests an attempt to bypass security controls by encrypting a payload. The document's content and heuristics indicate it's designed to trick users into downloading and potentially executing a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 https://netcdn.xyz/app/431946152/free-roblox-maps-game-hack PDF link annotation
    • http://www.saburai.ac.id/elibrary//repository/roblox-obby-gives-you-free-robux-july-no-password-2021.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/hack-para-volar-en-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/phantom-forces-roblox-coin-hack.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-use-cheat-engine-on-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-make-a-roblox-hack-using-hxd.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/does-getting-1-million-robux-for-free-work.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-dinosaur-simulator-cheat-engine.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-cheat-engine-patched.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-robux-hack-v3rmillion.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-stucid-fly-hack.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004110.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4110 24972 bytes
SHA-256: 0d28a8b35c471a084723fa86dfd29ee90758bef0317cb455885a4c8d09cde416
font_01_sfnt_off00007ad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD1 18548 bytes
SHA-256: d32f0a28cfde26a1174a61ce03d3ecef99c5a75e5e6e4f7086cf855da5c8549b

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