Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f4eb72787a4dbc1…

MALICIOUS

PDF

43.8 KB Created: 2021-06-02 06:00:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d5a5dd6d9f6e4bdc8dd9f11ddfdcea6d SHA-1: a80564f6a457f32778a187b8bb1e1f69798295af SHA-256: 0f4eb72787a4dbc1c0e282cedbe55d18f2bf348d0ec023df0f1b5726dea41d24
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document uses a lure related to 'Coin Master Free Spin Link' and game hacks to entice users to click on embedded URLs. These URLs, such as https://netcdn.xyz/app/406889139/coin-master-free-spin-link-today-2021-game-hack and others hosted on aiyta.com, are associated with malicious redirects or further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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-free-spin-link-today-2021-game-hack PDF link annotation
    • http://aiyta.com/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://aiyta.com/images/coin-master-free-food_GM406889139.pdfIn PDF document text
    • http://aiyta.com/images/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://aiyta.com/images/free-robux-working_GM431946152.pdfIn PDF document text
    • http://aiyta.com/images/roblox-promo-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://aiyta.com/images/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
    • http://aiyta.com/images/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://aiyta.com/images/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://aiyta.com/images/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://aiyta.com/images/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://aiyta.com/images/give-me-robux-now_GM431946152.pdfIn PDF document text
    • http://aiyta.com/images/free-400-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://aiyta.com/images/roblox-free-login_GM431946152.pdfIn PDF document text
    • http://aiyta.com/images/coin-master-freebies-2021_GM406889139.pdfIn PDF document text
    • http://aiyta.com/images/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://aiyta.com/images/coin-master-free-spins-link-download-today_GM406889139.pdfIn PDF document text
    • http://aiyta.com/images/free-minecraft-mods-for-ps4_GM479516143.pdfIn PDF document text
    • http://aiyta.com/images/coin-master-free-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://aiyta.com/images/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
    • http://aiyta.com/images/coin-master-apk-mod_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
stream_004_off00004bb4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BB4 25928 bytes
SHA-256: 16e9acbee6911de4db9dfc09d56fd6446f537e46ed9822ceb15eabaa1da7329d
font_01_sfnt_off000086c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86C2 18812 bytes
SHA-256: 209d45ed87732d827821998a5283e56b95c39a3af4032faff2e6da7d3e76f78f

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