Malicious PDF — malware analysis report

Static analysis result for SHA-256 90c631b078f9da0e…

MALICIOUS

PDF

48.4 KB Created: 2021-06-03 14:46:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 0c1391b7c128cf037825290499cf3922 SHA-1: f9a7ef9e844fa53c2450368f75b41b6a8af35cef SHA-256: 90c631b078f9da0ef99f0f21a8d81f0f63cc712b0dc50f926af173c22bfadf0f
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.online/app/431946152/login-robux-game-hack PDF link annotation
    • http://laboratorium.sman2metro.sch.id//repository/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-free-box_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-card-hack_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-heaven-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/how-to-hack-coin-master-game-2021_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/i-need-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/hack-coin-master-download-ios_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/minecraft-free-download-2021_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-25-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-roebucks-no-human-verification_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/robux-online_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/cheats-to-get-free-spins-on-coin-master_GM406889139.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
font_00_sfnt_off00005230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5230 25728 bytes
SHA-256: 669a3324270d81d2c7bbaed3ca87da3dcdb6273da59feb7326f9048e383a7a14
font_01_sfnt_off00008d3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D3D 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009a4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A4E 18260 bytes
SHA-256: 4106291cd7227c0d53e90b177fe3a1aab46e5afbd3f4c663f2e449fd295445b0

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