Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca48c117aca27f57…

MALICIOUS

PDF

43.6 KB Created: 2021-05-10 18:03:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ea2b3c04a9724b233b0f4757ab2597d3 SHA-1: 105074ee87e2ded66a3d86d17eef2fa582d397f6 SHA-256: ca48c117aca27f57f069643fd8fd7a52aaf4a4199c08e93b7aa1d378f8bbd45d
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 0.9952

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-hack-unlimited-spins-game-hack PDF link annotation
    • http://islandhopper.com.au/images/coin-master-free-spins-twitter_GM406889139.pdfIn PDF document text
    • http://islandhopper.com.au/images/coin-master-free-spins-link-deutsch-ios_GM406889139.pdfIn PDF document text
    • http://islandhopper.com.au/images/50-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://islandhopper.com.au/images/body-roblox_GM431946152.pdfIn PDF document text
    • http://islandhopper.com.au/images/coin-master-hack-mod-game-download_GM406889139.pdfIn PDF document text
    • http://islandhopper.com.au/images/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://islandhopper.com.au/images/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://islandhopper.com.au/images/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • http://islandhopper.com.au/images/hackear-juego-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://islandhopper.com.au/images/coin-master-hack-facebook_GM406889139.pdfIn PDF document text
    • http://islandhopper.com.au/images/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://islandhopper.com.au/images/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://islandhopper.com.au/images/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://islandhopper.com.au/images/roblox-free-items_GM431946152.pdfIn PDF document text
    • http://islandhopper.com.au/images/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004490.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4490 24856 bytes
SHA-256: 202efd2561f70bb50b2a482d6ad9ec6fe0cb7b93b1e144e551639c9ee3d6bb1d
font_01_sfnt_off00007cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CC6 3000 bytes
SHA-256: 56ee3cf210babcab1d595ec3cc7d666f7a646b8ea00ab1e6563ebd84f84582f8
font_02_sfnt_off00008726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8726 18584 bytes
SHA-256: c541d05fb8a64dd1c08ac9d68742a21d4cefcee797834aab422964311632701f

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