Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfa422d5b67db85a…

MALICIOUS

PDF

35.0 KB Created: 2021-07-04 12:12:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: abf823ad3faf542bd83ef997bd5ddfef SHA-1: a9ccb0e3cb42e863f4674fe35febc93f8ad21aad SHA-256: dfa422d5b67db85a871eabe85e22ab942a98c725cf64145d79fc5e57c21fbac8
82 Risk Score

Malware Insights

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

The PDF document contains embedded links and lures related to game hacks and free accounts, specifically mentioning Minecraft and Roblox. The primary malicious URL identified is http://netcdn.tw/app/479516143/free-minecraft-alt-accounts-game-hack, which is likely used to deliver a secondary payload or redirect to a phishing site. The ML classifier also strongly indicated maliciousness.

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/479516143/free-minecraft-alt-accounts-game-hack PDF link annotation
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/coin-master-card-collection-hack_GM406889139.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/stylish-idle-free-roblox_GM431946152.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/minecraft-java-edition-key-free_GM479516143.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://elearningmts01sgs.sch.id/__statics/gudangsoal/files/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/minecraft-aimbot_GM479516143.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/free-coin-master-cards-link_GM406889139.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://elearningmts01sgs.sch.id/__statics/gudangsoal/files/hacks-to-get-money-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/mcpe-master-hack-coins_GM406889139.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/getrobux-come_GM431946152.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/code-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/free-spins_GM406889139.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/tiktok-bots-free_GM835599320.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/coin-master-free-spin-trick_GM406889139.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/coin-master-free-2021-spin-link-today_GM406889139.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/roblox-hack-download-pc_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_off000034ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34BA 22480 bytes
SHA-256: c9b19fb2fb53ecc16a12cbecadc4c23c54b295032e264734b556be53626bf284
font_01_sfnt_off00006673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6673 18212 bytes
SHA-256: a587ad5d7ccc78e3894402c93b871667a6b3b423df15bdaf3724955d5b668927

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