Malicious PDF — malware analysis report

Static analysis result for SHA-256 df36afad9c455ab9…

MALICIOUS

PDF

34.9 KB Created: 2021-07-03 11:35:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d504f03f714670a4b853ac86438a6962 SHA-1: d74fae59762df9a0052cee1f07235ef86a308aef SHA-256: df36afad9c455ab9024b60f71626cdb9e84d2fed5f4a93fb4cb0331ce3e6f326
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.tw/app/479516143/download-minecraft-java-edition-free-game-hack PDF link annotation
    • http://lib.uho.ac.id/library/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/no-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-unlimited-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-spins-moonactive_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-tool-no-survey_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/toolbox-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/pokemon-go-free-150_GM1094591345.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-hack-online-generator_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/get-free-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/wurst-client_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/ear-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/mcpe-master-unlimited-coins-hack-apk_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/howto-wall-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_off00003235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3235 22476 bytes
SHA-256: d66a6839df815aa405191cbf513f0c651aad93d7e9004af1ad069d5430a86643
font_01_sfnt_off00006428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6428 18856 bytes
SHA-256: e95e0befe6b0f5e52bf26004d68c5314d9c4319229837ab9b7c393f21c81bf12

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