Malicious PDF — malware analysis report

Static analysis result for SHA-256 e12afc755de7c094…

MALICIOUS

PDF

41.9 KB Created: 2021-05-11 15:34:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4f3678f3d198515c6280d177a35eb392 SHA-1: d7ba4082e732cb613e3a60b542ff9fbc3687ed40 SHA-256: e12afc755de7c0943edb30a94c5d76f480cfd20a6bca37a02b809f8da6f2f3df
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 0.9971

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.xyz/app/406889139/free-spins-on-coin-master-2021-ios-game-hack PDF link annotation
    • http://www.perpus.stfm.ac.id/repository/spinuri-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-jackpot-madness-hack_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-get-java-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-to-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/minecraft-windows-10-key-free_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-game-free-spin-download_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/hack-my-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/roblox-rewards_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-roblox-accounts-that-work_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-free-spins-gratis_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-free-link-app_GM406889139.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
stream_003_off00004884.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4884 24664 bytes
SHA-256: d1163252d472df2c0cd8390705da04672fc21d01890e5af1de09a9a5f64f416a
font_01_sfnt_off0000817f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x817F 18288 bytes
SHA-256: 9fe1374c2a5f04ab05412f91fd2327b7ecdc71e8abb7b76c0a33ea1eb285afe1

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