Malicious PDF — malware analysis report

Static analysis result for SHA-256 874ec64b709fe6b4…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 21:28:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: efb7ec47f519ac81761d6e03fae93975 SHA-1: 767cbe020d39298ecbb75dae5b680f45a3b66263 SHA-256: 874ec64b709fe6b45c5bcd5ef58f0c76d3121d6d0623ec5808a0e66edf90cc48
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/406889139/free-spins-coin-master-app-iphone-game-hack PDF link annotation
    • https://elibrary.sttar.ac.id/repository/coin-master-free-download-for-pc_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/veste-free-in-game-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/fearless-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/how-to-get-free-robux-on-ipad-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/games-like-coin-master_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/roblox-prison-life-hacking-sex_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/completed-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/how-to-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/vashta-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/roblox-hack-tool-no-survey-no-download_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/1-free-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/coin-master-hack-mod-apk-2021-download_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/spins-gratis-coin-master-hoy_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/roblox-free-robux-generator-download_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/how-to-get-free-robux-roblox-youtube_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_off00003044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3044 22492 bytes
SHA-256: 6756c243fde80b5bf9540b88147110e98326cbaddb2e8e7bf58ebaa7d74a0750
font_01_sfnt_off0000626c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x626C 18340 bytes
SHA-256: 5d3b7efe24fb7202b678ba95f2c20ee71961a530999bc5dc4afdd93f09e9708b

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