Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e4f0410abbea0c9…

MALICIOUS

PDF

45.6 KB Created: 2021-05-11 16:31:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 97e048e6a603c9b326beaf8a8fe5f2fa SHA-1: 66d57b2ccebbc3bb71be622439b5902956a85a34 SHA-256: 3e4f0410abbea0c941082f53d0d90c487d7a0d66f60ddcd0ef7546cfc6d28f46
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 0.9507

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/406889139/100-free-spins-coin-master-game-hack PDF link annotation
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-daily-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-daily-free-link_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/free-spin-links-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/minecraft-wurst-client_GM479516143.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-attack-hack-apk_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-admin-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-free-chest-link_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-free-spin-27_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-hack-version-2021-download_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/how-to-get-java-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-free-spin-redeem-code_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
stream_003_off00004b74.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B74 26108 bytes
SHA-256: 15f4efd91b4749e76b09746f73e2f97d22c6e880eb9ec91457e71db4287d2d53
font_01_sfnt_off00008632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8632 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000901d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x901D 18164 bytes
SHA-256: 9bc61af2acbda784231945e40c4a4bb5d6810b0d04641be6b37b2cdd3c5b78bc

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