Malicious PDF — malware analysis report

Static analysis result for SHA-256 f54925e8895562cf…

MALICIOUS

PDF

37.0 KB Created: 2021-07-06 06:35:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: b357f5554b43b0d629ae0891ee107916 SHA-1: 4e998a6bbd22d898a8a5e1f5f009cee98b8a1c8e SHA-256: f54925e8895562cfd31fc0a49c0ab49aeb5d936fffa6eee0acda2cb24421efa1
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 0.9981

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 http://netcdn.tw/app/431946152/free-generator-game-hack PDF link annotation
    • http://perpus.masda.ac.id//repository/roblox-online-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/robuxglobalcom-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/tiktok-free-skin-event_GM835599320.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-coin-master-spin-generator_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/impact-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-spins-coin-master-october-17-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-roblox-hack-proof-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/easy-hack-to-get-halos-in-royale-high-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-star-codes-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/hack-roblox-games-pastebin_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/aternos-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-free-spins-ios_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/http-bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/2021-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-no-apps-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-do-you-get-free-robux-on-roblox_GM431946152.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
font_00_sfnt_off00003ad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3AD7 22768 bytes
SHA-256: b0d23e5f3376b32dda37dc7a5325317cfc2455555ca50b2202ab48fe20a1d1c8
font_01_sfnt_off00006df7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF7 18312 bytes
SHA-256: 187d6f615b557117bfff21cb1984978064311fea2e79d0c86d9b4be90d996e92

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