Malicious PDF — malware analysis report

Static analysis result for SHA-256 779f4d927009fb1d…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 22:53:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 3837a0ecf2af60adb59fb0a2fb62a406 SHA-1: 69f6cecafc40c34f24fc4ef8b64b4e90ebdfb426 SHA-256: 779f4d927009fb1df995f6e7504d2cd07f90bbc10b5bd576fae319ddb46da979
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains embedded links that are designed to lure users into clicking on them by promising game hacks and free currency. The primary link, http://netcdn.tw/app/406889139/coin-master-facebook-free-spins-game-hack, redirects to a website likely hosting malicious content. The presence of multiple similar lures across various game-related topics suggests a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/406889139/coin-master-facebook-free-spins-game-hack PDF link annotation
    • http://psb.sd-alazhar29.sch.id/repository/roblox-com-games-referrer-roblox-player_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/robux-hack-tool-download-2021_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/impact-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/how-to-call-roblox-for-free-robux_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/how-you-get-robux_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-roblox-keyloggers-v3rmillion_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/heroes-online-roblox_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/iron-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/treasure-hunrt-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/coin-master-free-2021-spin-link-today_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-roblox-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/coin-master-hacks_GM406889139.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
stream_002_off00003060.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3060 23056 bytes
SHA-256: 6d7f1992047cab7a25e74334ec51c478ebaa7b0d19254d1e9d0b62ec4d372df9
font_01_sfnt_off00006401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6401 18504 bytes
SHA-256: 46e57e29613dd658c869552faba04ca4652fd731f51f8a20629119a06e53848c

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