Malicious PDF — malware analysis report

Static analysis result for SHA-256 a70257e7f0c827a6…

MALICIOUS

PDF

35.6 KB Created: 2021-06-23 23:49:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 68b975b2c3ca911ea1d68a7289138f01 SHA-1: 1ca78f77ab42cd7b909a7b15a6dce26d2ddd5e0a SHA-256: a70257e7f0c827a67d472abbccf769b3dc783419d6c6805a70db72b5a7b578fa
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 0.9980

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 http://netcdn.co/app/431946152/free-robux-no-human-verification-or-survey-2021-game-hack PDF link annotation
    • http://jarviskeller.co.uk/media/storage/editor/files/coin-master-hack-ios-no-human-verification_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/coin-master-hack-pc-cheat-engine_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/minecraft-logo-maker-free_GM479516143.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/roblox-apk-robux-hack_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/free-redeem-code-on-roblox_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/coin-master-pc-hack_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/como-hackear-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/coin-master-cheat-apk-free-download_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_off000031b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31B4 22224 bytes
SHA-256: 4f53e36f3997cb357fe1c8ea79ca3cf6eb975cb5c9b0837598ed69f5479ca8bc
font_01_sfnt_off0000634e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x634E 20028 bytes
SHA-256: a686843967d16d630a3d792aecd0df7810ef9440d33d67b3fe7886ce86e787de

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