Malicious PDF — malware analysis report

Static analysis result for SHA-256 a41083a09b8e3277…

MALICIOUS

PDF

44.3 KB Created: 2021-05-12 06:35:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 1a107c7ae821c555d95b7e8a920ab159 SHA-1: e127f575ef826ce598bc8c603e522c281f0812e6 SHA-256: a41083a09b8e327786d7a2c340c21a9d837ee2112eab48073dbff2d0f78eaf65
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 0.9648

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/479516143/free-op-minecraft-servers-game-hack PDF link annotation
    • http://diatecgroup.com/images/spins-coin-master_GM406889139.pdfIn PDF document text
    • http://diatecgroup.com/images/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://diatecgroup.com/images/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://diatecgroup.com/images/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://diatecgroup.com/images/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://diatecgroup.com/images/how-to-make-a-server-in-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://diatecgroup.com/images/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://diatecgroup.com/images/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://diatecgroup.com/images/coin-master-daily-spin-link-app_GM406889139.pdfIn PDF document text
    • http://diatecgroup.com/images/how-to-make-a-minecraft-java-server-for-free_GM479516143.pdfIn PDF document text
    • http://diatecgroup.com/images/coin-master-hack-mod-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://diatecgroup.com/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://diatecgroup.com/images/minecraft-apk-android-free_GM479516143.pdfIn PDF document text
    • http://diatecgroup.com/images/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://diatecgroup.com/images/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://diatecgroup.com/images/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • http://diatecgroup.com/images/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • http://diatecgroup.com/images/free-free-robux_GM431946152.pdfIn PDF document text
    • http://diatecgroup.com/images/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://diatecgroup.com/images/coin-master-online-hack-no-human-verification_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_off00004981.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4981 24832 bytes
SHA-256: 590d0c27baf20abe8480b81b8c99c1225a97b556f076c0ddeebb89124b7ea615
font_01_sfnt_off00008200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8200 2924 bytes
SHA-256: 89b375b3099c16285f8fe3c63d3b9e52cb99b52dd2caab822764707661633145
font_02_sfnt_off00008c14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C14 17856 bytes
SHA-256: a77b7ff2a68dfc8683e01ffa7febdd478081a7961822aa2eebc6e1611696765c

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