Malicious PDF — malware analysis report

Static analysis result for SHA-256 678bdb0382715df6…

MALICIOUS

PDF

43.8 KB Created: 2021-06-09 16:36:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e198ff2bcd45b8af5b003c2ae6565d5d SHA-1: 594734f5bcf489e5801588c97890cb3d482d7ebb SHA-256: 678bdb0382715df66adca4d092af6d8bba717023790c84dcdfbf3984377273e0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, with a primary lure related to 'how to hack a Roblox game'. The ML classifier and heuristic firings strongly indicate malicious intent, likely to redirect users to phishing or scam pages. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a social engineering attack aiming to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/how-to-hack-a-roblox-game-hack PDF link annotation
    • http://repository.poliven.ac.id//repository/tiktok-free-generator_GM835599320.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/free-roebucks-no-human-verification_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/links-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/robux-hack-download-no-survey_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/how-to-make-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/lazyblocks-com-robux_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/free-minecraft-shaders_GM479516143.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/how-to-get-free-roblox-music-2021_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/is-java-minecraft-free_GM479516143.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_004_off00004fd3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FD3 24672 bytes
SHA-256: b6fff4c83856926587128e58fa90f0c9e48ae3179ad5f6bd7b572f217193a51c
font_01_sfnt_off0000880e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x880E 18344 bytes
SHA-256: ba89a104ebe8420c79faa6ea278bc7eb98c0231a931bc6286cf1c7ff45f53f5d

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