Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d6610abe0205b24…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 10:11:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 40cce5e177d47f81cea5a52f1be6bf7f SHA-1: ab525401bcdc3c0392b70651b298ac8c5f38a215 SHA-256: 5d6610abe0205b240c6704c19565389eef33ceeb151bd1b6a225681f4499c10f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a common lure of free in-game currency and hacks for popular games like Coin Master and Roblox. It contains multiple embedded URLs, with a primary redirector at http://netcdn.tw/app/406889139/free-coin-master-spins-for-today-game-hack, which likely serves as a gateway to malicious content or phishing pages. The ML classifier strongly flagged this PDF as malicious, supporting the observed lure and redirection techniques.

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-coin-master-spins-for-today-game-hack PDF link annotation
    • http://lib.untad.ac.id/repository/free-roblox-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-mod-apk-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/cheat-roblox-jailbreak-glitches_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/el-hacker-de-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/change-your-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-jailbreak-infinite-fire-truck-hack-farm_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-coins-and-spins-today_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/working-redeem-roblox-cards-free-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-become-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/murder-island-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/cool-roblox-outfits-for-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-oprewards_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-no-clickbait_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-clothing-on-roblox-names_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/get-free-things-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hack-blogspot_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000312b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x312B 23136 bytes
SHA-256: 86f5302acbd052966ac612772188084162ea4e0d48a22111a81c562fb689fa3e
font_01_sfnt_off00006568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6568 18528 bytes
SHA-256: 7516c489b1b881653228620cc2b0dc971f4c0cc04e000053424a555de8493b8f

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