Malicious PDF — malware analysis report

Static analysis result for SHA-256 889673b07ee500df…

MALICIOUS

PDF

45.7 KB Created: 2021-06-07 22:47:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c43e18079ff0ff8d437fb5e3c423f0be SHA-1: 56c7fabe1317dfa4e11535460ab7d276420fa685 SHA-256: 889673b07ee500df74cc7344072b78b10b46fbffcb14231ca24a346a743450ee
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/how-to-get-free-robux-in-roblox-inspect-2021-game-hack PDF link annotation
    • http://msfs-eastafrica.com/images/coin-master-hack-app-for-ios_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/roblox-robux_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/coin-master-15-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/get-coin-master-spins-free_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/coin-master-fan-hack_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/easy-robux-com_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/minecraft-java-edition-free-code_GM479516143.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/descargar-roblox-hackeado-2021-para-android_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/tiktok-free-nose-job_GM835599320.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_004_off00004e80.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E80 28484 bytes
SHA-256: 11dc3a8b5dc1df9448ea98bba28f14830e6a6867ce9362464995918821f32771
font_01_sfnt_off00008e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E1E 18936 bytes
SHA-256: eaff3e4476af04951e4ecfaf83d1912c03a9c80a6c9d36df9f698915fd773e23

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