Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b8840888f056798…

MALICIOUS

PDF

33.9 KB Created: 2021-06-30 04:11:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9f87894a21872d5714d66ef103995a74 SHA-1: 50639fa7a36bfa4f31717f8529641e9fe64e23c3 SHA-256: 4b8840888f056798c2b0dcd2de071dffbe67a551d3504c59b7d259fff100aa70
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/free-pets-adopt-me-roblox-game-hack PDF link annotation
    • https://opac.umrah.ac.id/repository/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-earn-robux-in-roblox-free_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hack-apk-android_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/earn-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/www-roblox-cheatus-limited-amount-hurry-and-claim_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-hourly-giveaway_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/destroy-walls-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/minecraft-java-code-free_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-codes-pins_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/apocylopse-rising-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-strategy_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/noob-vs-pro-vs-hacker-roblox-bee-swarm-simulator_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-install-free_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-do-you-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-no-verification-needed_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_off00002ce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CE1 22216 bytes
SHA-256: cd84f0e81e2b15c6a9ba9b5e6382485ea98f061b5d95e0366cb23c34f32077a1
font_01_sfnt_off00005e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E36 19452 bytes
SHA-256: 3b20b865f513e9b352c17c84e945c814c8dd61964cc41c19de73296c3d2b0278

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