Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7f86f306542f668…

MALICIOUS

PDF

45.6 KB Created: 2021-06-04 01:45:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 807ae5ed02eb4d3d98cd11c4a8e502ec SHA-1: 128c8dffd71b0e4b81ee2ff9e7a73c8cac157903 SHA-256: f7f86f306542f6681429bb745c8d4fa8fe23bbfbb1944a3ddc8cfabd95eb3ce9
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.online/app/406889139/coin-master-free-spins-link-fb-game-hack PDF link annotation
    • http://library.umla.ac.id/repository/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/robux-free-com_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-spins-daily-link-game-mod_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-spins-link-deutsch-ios_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-roblox-intros_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-minecraft-wallpaper_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-review_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/real-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-scams_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
stream_004_off00005159.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5159 29548 bytes
SHA-256: 1b07e68da089d8611f0c7b5b64f516415bfec4de614f4d6511ca7748b1a92556
font_01_sfnt_off00008fe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FE1 18212 bytes
SHA-256: 153b03de70bf47e00961d1eb15290d97720f28a081cc1f58d06d8a14fcc8ca5b

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