Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6291b4bfe3cb774…

MALICIOUS

PDF

36.5 KB Created: 2021-05-24 15:35:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b142e3e493ec2497d22f53873ba12407 SHA-1: 5460d75ead1f2bc027374b4599b856275a7961d3 SHA-256: d6291b4bfe3cb774a2c9a854705d7820ef29c61ba833877ec94574a7b2d7c47b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links and a call-to-action phrase, 'CLICK HERE TO ACCESS ROBLOX GENERATOR', designed to trick users into visiting a URL that promises free Robux. The primary malicious URL identified is https://netcdn.xyz/app/431946152/free-robux-without-verification-2021-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest a potential for malicious redirection or further payload delivery, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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-robux-without-verification-2021-game-hack PDF link annotation
    • http://simpt.stikesmitrakeluarga.ac.id/cendana/repository/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://simpt.stikesmitrakeluarga.ac.id/cendana/repository/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://simpt.stikesmitrakeluarga.ac.id/cendana/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://simpt.stikesmitrakeluarga.ac.id/cendana/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://simpt.stikesmitrakeluarga.ac.id/cendana/repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://discordIn 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_002_off0000317d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x317D 24488 bytes
SHA-256: 3505269fccc2a6b1ff1e5df1145c8959b38460c274f12018bdf6ce150e46891d
font_01_sfnt_off00006a06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A06 19368 bytes
SHA-256: a82984a519d7edf94c6531cfcf7f8df3cbe602e214b877051ae5dee029c294bf

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