Malicious PDF — malware analysis report

Static analysis result for SHA-256 f283dde1a204f42c…

MALICIOUS

PDF

48.7 KB Created: 2021-06-09 04:26:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: e225885a7082cb3a7d997ca970e02463 SHA-1: 07b34d972d60eb93ba60a962ecd0d8c50fd53603 SHA-256: f283dde1a204f42c6fb7da57e8d1bc6de9aeb433c8766cc89af94483ec76019e
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 0.9796

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.tw/app/431946152/how-to-make-free-shirts-on-roblox-2021-game-hack PDF link annotation
    • http://library.atim.ac.id/repository/free-roblox-clothes-boy_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-admin-free-spins_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-tiktok-followers-no-human-verification-or-survey_GM835599320.pdfIn PDF document text
    • http://library.atim.ac.id/repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/minecraft-hacks-ps4_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-group_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-free-roblox-hair_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/arsenal-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-daily_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/tbc-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/get-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/howt-to-hack-roblox-with-cmd_GM431946152.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_004_off00005075.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5075 28084 bytes
SHA-256: 5fb353ca7a0f8f5567f585b1ab7adbbc5d3907ded633dbd1f60ce717cd6c7250
font_01_sfnt_off00008e2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E2B 2852 bytes
SHA-256: e9630f3bb738ae3bc329a423cf069c8035d70ce2227e3557c42815f85ad3284f
font_02_sfnt_off000097ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97ED 19496 bytes
SHA-256: 1ec6e5f98a6f7322632bda9c155d766d51113ef7ae0af333a7c1defd0e292284

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