Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3af9e601063c975…

MALICIOUS

PDF

44.5 KB Created: 2021-06-04 05:20:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: f9660f479db656e11a0e2320359e028e SHA-1: 52a2c6b9ff728bf84e21ddb190a839303c036842 SHA-256: d3af9e601063c975b2819d49cdf336a7f54d59a78a9851ce60fc3955e6c7edce
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 0.9865

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/431946152/www-surveytool-com-free-robux-game-hack PDF link annotation
    • https://library.stikesmi.ac.id/repository/www-coinmaster_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-minecraft-mods-for-ps4_GM479516143.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/roblox-free-draw_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-gift-link-hack_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-free-spins-usa-2021_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-32-android-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-hack-apk-april-12-2021_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/how-to-earn-robux-fast_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/how-to-get-free-gamepasses-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/minecraft-pe-mod-menu_GM479516143.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/roblox-hack-me_GM431946152.pdfIn PDF document text
    • https://www.bandicam.comIn 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_004_off00004efa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EFA 25560 bytes
SHA-256: b0d4b3c6b164310b10e3bc0d0e3285668dcbe88b87bf92b3f53481d48af787b6
font_01_sfnt_off000088d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88D7 19108 bytes
SHA-256: 671fbf442e48a5f467e8e2f3868bdb9ed3b8a048b7dc474d3da2c83a3628adc7

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