Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2afc17f9c281ce4…

MALICIOUS

PDF

37.0 KB Created: 2021-07-04 11:50:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: ce82a5ac8d081029afa99a36cba10350 SHA-1: 21a8925ea025a45d00b6e482c96837f3c18593d8 SHA-256: c2afc17f9c281ce4470340619dbd28d17d1edffd57f4346e364ede424ab6bfff
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 0.9886

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-and-coins-coin-master-links-game-hack PDF link annotation
    • http://library.stieyapan.ac.id/repository/free-spins_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/hack-coin-master-dzooka_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-tool-without-verification_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-girl_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/claim-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/microsoft-rewards-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-daily-link_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-spins-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/village-3-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/is-tiktok-free-on-voxi_GM835599320.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-rtx-download-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-minecraft-skins-java_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-daily-free-spins-today_GM406889139.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
font_00_sfnt_off000030c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C7 22488 bytes
SHA-256: 88a2d9b43f6c1257e826f81f15fff85f5f15bca7606fa96bd8baa96380afcd77
font_01_sfnt_off000062f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F6 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00006cdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CDB 18520 bytes
SHA-256: 0611ff1470bbf14b410014ba84be5a7a1ba8d25e48472ec85a2f27b932274abb

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