Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9e7cecfde92a443…

MALICIOUS

PDF

35.0 KB Created: 2021-07-10 00:39:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7cafc87693dae8fa8930f99e14ebdfb6 SHA-1: 8c2120092f2fcb4cf2da9cac0ded589eca5a1226 SHA-256: e9e7cecfde92a443d44e8a6683da6553f9a6f15bd993d1be88f5a735e4a90621
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a "free generator / game hack" which redirects to the URL http://netcdn.tw/app/406889139/free-spins-on-coin-master-2021-ios-game-hack. This heuristic, combined with the ML classifier flagging the PDF as malicious, strongly suggests a phishing or scam attempt. No scripts were extracted, but the presence of embedded URLs indicates a redirection to potentially malicious content.

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-on-coin-master-2021-ios-game-hack PDF link annotation
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/tiktok-free-pictures_GM835599320.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/coin-master-hack-apk-facebook-login_GM406889139.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/girl-free-roblox_GM431946152.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/haktuts-coin-master_GM406889139.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/hack-blob-sim-2-roblox_GM431946152.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/free-roblox-script-executor_GM431946152.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/what-is-robux-in-roblox_GM431946152.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/easy-robux-com_GM431946152.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/robux-free-co_GM431946152.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/roblox-cheat-engine-retail-tycoon-hack_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
stream_002_off00003284.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3284 22616 bytes
SHA-256: f947eff8d23c7ee3e15d3eed42f83e682bebc51927a33eb69a289bb417286896
font_01_sfnt_off00006517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6517 18576 bytes
SHA-256: 2bcc00c8b514798c5e9e3413f1d3857e1ac65e8691b0e4a0078912bca2c3dd84

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