Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b5ae4b85ad8bc95…

MALICIOUS

PDF

33.6 KB Created: 2021-06-29 09:22:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e01975c9914128af16b2f3512d3289c8 SHA-1: ea440df23844fd9a44802c184c01d229d50f3609 SHA-256: 4b5ae4b85ad8bc959813a602cf1895e10254ec9e6dac7369cfcb671a0de95255
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links and text promoting 'free Robux' and game hacks, directly linking to a malicious URL. This indicates a social engineering lure designed to trick users into visiting a potentially harmful site. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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 http://netcdn.co/app/431946152/greenlegocats-how-to-get-free-robux-game-hack PDF link annotation
    • http://digilib.stie-yppi.ac.id/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/anti-ban-and-kick-cheat-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-make-your-own-robux-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-no-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/obc-free-roblox-account_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/op-rewards-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/tiktok-free-like-and-views_GM835599320.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-pe_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-can-you-hack-roblox_GM431946152.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
font_00_sfnt_off00002b6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B6A 22920 bytes
SHA-256: a74bb729e0491f519f8d940ba4b4d4a0ca04bb77c7cfe4d531164458e601b5a4
font_01_sfnt_off00005ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EAD 19056 bytes
SHA-256: 53e060ebfa902a5bbd2a2b9de47739c7eaec3a5c1b0e41fbe761f6907e5c53f2

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