Malicious PDF — malware analysis report

Static analysis result for SHA-256 126ef7b9f9d9b3a4…

MALICIOUS

PDF

44.7 KB Created: 2021-06-08 20:52:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: fb96b60b9c4310021265b6706571fd55 SHA-1: 8062934e783ca83a5e3b2f499581b5aca997f150 SHA-256: 126ef7b9f9d9b3a4d15d1b3e960f253fc4594e8b56d1201f10e8afac7a819f83
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links that redirect to a malicious URL, masquerading as a game hack or generator. It impersonates Microsoft, attempting to trick users into clicking the link. The ML classifier strongly indicates maliciousness, and the presence of multiple lures suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/sharkblox-trash-gang-shirt-free-roblox-game-hack.
  • 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.tw/app/431946152/sharkblox-trash-gang-shirt-free-roblox-game-hack PDF link annotation
    • http://pustaka.antropologi.fisip.unand.ac.id/repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://pustaka.antropologi.fisip.unand.ac.id/repository/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://pustaka.antropologi.fisip.unand.ac.id/repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.antropologi.fisip.unand.ac.id/repository/how-to-get-robux-free-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.antropologi.fisip.unand.ac.id/repository/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • http://pustaka.antropologi.fisip.unand.ac.id/repository/how-to-obtain-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.antropologi.fisip.unand.ac.id/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.antropologi.fisip.unand.ac.id/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.antropologi.fisip.unand.ac.id/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.antropologi.fisip.unand.ac.id/repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.antropologi.fisip.unand.ac.id/repository/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.antropologi.fisip.unand.ac.id/repository/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.antropologi.fisip.unand.ac.id/repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://pustaka.antropologi.fisip.unand.ac.id/repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://pustaka.antropologi.fisip.unand.ac.id/repository/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • http://pustaka.antropologi.fisip.unand.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://pustaka.antropologi.fisip.unand.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.antropologi.fisip.unand.ac.id/repository/blackberry-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.antropologi.fisip.unand.ac.id/repository/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • http://pustaka.antropologi.fisip.unand.ac.id/repository/free-robux-no-download_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_off00005107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5107 24692 bytes
SHA-256: 908cb3afc99b2e54808c79036e04e26ea7b14fbec71ed779cab6ad38946d8e30
font_01_sfnt_off00008a05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A05 19024 bytes
SHA-256: 06ad0634a97a3a33d8e439fe7847a6d3cf0a184f56c8071c19e8881d8e9f5eef

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