Malicious PDF — malware analysis report

Static analysis result for SHA-256 cff21c7125c22b61…

MALICIOUS

PDF

42.4 KB Created: 2021-05-11 18:31:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 05617c6b80bcc026babce011fcaad24e SHA-1: a0e3026d6edf06a7f8bba3c0171c1c6cc32fe327 SHA-256: cff21c7125c22b618d8b9fbca5391f3953885115309250fc566dc208269aba08
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 0.9971

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.xyz/app/431946152/free-robux-hack-game-hack PDF link annotation
    • http://muslib.unmus.ac.id//repository/roblox-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-hack-iphone_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/getrobux-now_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/robux-only_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/roblox-install-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/robux-withdraw_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/client-minecraft_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/minecraft-free-games-no-download_GM479516143.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_off00004925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4925 24964 bytes
SHA-256: bc96bcec8289340bc0aefe3d346c5fc456decacb9a1847e6746e65a58cd68d38
font_01_sfnt_off000082d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82D9 18412 bytes
SHA-256: 8090616d8a5c0701bec53dfbbcc7430816d9db69864bd7c9067c717eb12c26b4

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