Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3d78238da11ee61…

MALICIOUS

PDF

41.3 KB Created: 2021-05-16 08:03:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: f6361cc65f0c281d65636a97e5413ff5 SHA-1: 0dd079d8daf3b14acc05561789ba6c46f1027668 SHA-256: f3d78238da11ee61fb06f503070e07ffe765767ee0a51f37377417aa41ed68b9
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/406889139/coin-master-tiradas-gratis-link-game-hack PDF link annotation
    • http://medimacs.eu/images/how-to-hack-coin-master-game-without-verification_GM406889139.pdfIn PDF document text
    • http://medimacs.eu/images/coin-master-exchange-40-free-spins_GM406889139.pdfIn PDF document text
    • http://medimacs.eu/images/coin-master-free-spin-and-trading_GM406889139.pdfIn PDF document text
    • http://medimacs.eu/images/coin-master-home_GM406889139.pdfIn PDF document text
    • http://medimacs.eu/images/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://medimacs.eu/images/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • http://medimacs.eu/images/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • http://medimacs.eu/images/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://medimacs.eu/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://medimacs.eu/images/free-group-roblox_GM431946152.pdfIn PDF document text
    • http://medimacs.eu/images/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://medimacs.eu/images/working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://medimacs.eu/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://medimacs.eu/images/coin-master-free-spins-link-download-ios_GM406889139.pdfIn PDF document text
    • http://medimacs.eu/images/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://medimacs.eu/images/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://medimacs.eu/images/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://medimacs.eu/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://medimacs.eu/images/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://medimacs.eu/images/minecraft-free-android_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
stream_003_off000047f6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47F6 25040 bytes
SHA-256: 70d707e4e932487024995adc3ffa094d3d3d08fa82f82feb248a477010518421
font_01_sfnt_off00007ff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF2 17888 bytes
SHA-256: 7e3d0d6e3169ec9d1b4a39f1a8de513868e09ebca0bcabadf274b5e058877262

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