Malicious PDF — malware analysis report

Static analysis result for SHA-256 66f420c3d1bd3d6c…

MALICIOUS

PDF

45.8 KB Created: 2021-06-10 14:38:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a90c79860c1f7d45792448ab942cec6d SHA-1: 180054062d8ded31e7fecf13cb2f3f74ce2c4ba3 SHA-256: 66f420c3d1bd3d6cd783c3dfb0a05d7a6494002155edd49aa2b121aaf01d0b86
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 0.9864

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/roblox-bleu-hack-game-hack PDF link annotation
    • http://pustaka.fti.unand.ac.id//repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/do-robux-generators-work_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-hack-android-root_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/lucky-patcher-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-robux-master_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/hack-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/robux-free-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/get-2021-free-spins-on-coin-master_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
font_00_sfnt_off0000510f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x510F 26800 bytes
SHA-256: 20127ab794e0bbbaf32229db8602fbe80ad553c289792cceb94e320323f0179a
font_01_sfnt_off00009065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9065 18320 bytes
SHA-256: 40048082232ff9dda202d7e0426062f5de2ecbc497d29d051baa39509c2a934b

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