Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bcc17f4c39e977d…

MALICIOUS

PDF

48.7 KB Created: 2021-06-03 06:56:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: dd8690c1c7bd98bde0cc494d82a42fa7 SHA-1: 21261f152677087f745e23f374b4c65ea6136900 SHA-256: 8bcc17f4c39e977ddba5fdbae7dff42766a49a69afade8324f67a623760c1878
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 0.9796

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.online/app/406889139/how-many-levels-in-coin-master-game-hack PDF link annotation
    • http://e-library.akbid-purworejo.ac.id/repository/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/roblox-comcom_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/coin-master-free-coins-and-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/free-executor-roblox_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/how-to-get-free-spins-grom-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/free-script-executor-roblox_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/coin-master-hack-ios-without-verification_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/minecraft-hacker-mask_GM479516143.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/free-roblox-glasses_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/coin-master-cheat-apk-free-download_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/get-free-spins-on-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/level-coin_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f9e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F9E 24592 bytes
SHA-256: b795415fedba2a130fc0c30b04a382cab02835299f363e8aa32f0febde2fb395
font_01_sfnt_off000087a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87A8 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_02_sfnt_off00009c32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C32 18076 bytes
SHA-256: 99893503d576b54c6a7779c175b2bfa9d44389b8fa70f32573e8e1493170e333

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