Malicious PDF — malware analysis report

Static analysis result for SHA-256 c62a671e7f00c853…

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 12:46:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f567971f5948f39938e422d1ef55afea SHA-1: 9dfd3aa385a8963e2b9fa133bd6d8048d6f68f46 SHA-256: c62a671e7f00c8533e82a41c367a47687a99d6089f2ca5acd972117eb042e17f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a lure related to 'free spins' and 'game hacks', directing users to a suspicious URL. This URL, http://netcdn.tw/app/406889139/free-spins-coin-master-twitter-game-hack, is likely part of a phishing or malware distribution scheme. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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.tw/app/406889139/free-spins-coin-master-twitter-game-hack PDF link annotation
    • http://www.arichuna.com/images/files/coin-master-free-spin-app-apk_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/coin-master-free-spin-links-december-30-2021_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/hack-robux-into-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/roblox-studio-free-download_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/real-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/rewardrobux-com_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/apk-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/roblox-ninja-head-for-free_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/google-moon-active_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/agast-2021-hacks-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://www.arichuna.com/images/files/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • http://www.arichuna.com/images/files/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/best-roblox-hacking-software_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/wwwcoin-master-free-spincom_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/roblox-how-to-get-free-followers_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
font_00_sfnt_off00002f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F6F 22372 bytes
SHA-256: 1ca627c485b470049f2ee656613b55b47d43251b4664e83a9b352ece6a4ab568
font_01_sfnt_off00006158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6158 18336 bytes
SHA-256: fad18ba24583aad0ada5315d9085d0f54c571018171a48420ec776ee5c3fad25

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