Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ff10ec816fed943…

MALICIOUS

PDF

35.7 KB Created: 2021-07-03 13:08:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0c76126c535a5c27d08229de0def7789 SHA-1: e48eaef9b588c6492d64cc7e2553ce6069269551 SHA-256: 4ff10ec816fed9439088e2b41fd31da2bb575de79d70b224369ecb7cc3f50de3
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to external websites, primarily offering game hacks and free in-game currency for popular games like Coin Master and Roblox. The heuristic firings indicate these links are intended as lures to redirect users to potentially malicious content. While no scripts were explicitly extracted, the nature of the lures and the embedded URLs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/coin-master-free-coins-amp-game-hack PDF link annotation
    • http://www.stttekstil.ac.id/elib/repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/is-free-robux-real_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/change-your-roblox-name-for-free-reddit_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/cheat-roblox-pc-phantom-forces_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-roblox-red-shirt_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/apk-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-games-free-play-online_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-roblox-executor-no-key_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-get-prison-life-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-cmds-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/hacks-para-coin-master_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/easy-robux-hack_GM431946152.pdfIn macro / runtime command snippet
    • http://www.stttekstil.ac.id/elib/repository/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/pubg-uc-with-paypal_GM1330123889.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-enter-passcode_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-get-free-coins-in-roblox-pet-simulator_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/eIn macro / runtime command snippet
    • 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_off00003466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3466 23192 bytes
SHA-256: 12d7ae31210f8b60255cf5b264532696f507b1fce20bb6f0d42ef3b9dd2f0849
font_01_sfnt_off000068a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68A1 18432 bytes
SHA-256: 115052c54ad7be7ecf7f7200d638d52990c020622732c51f9e53714cbdbedbdf

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