Malicious PDF — malware analysis report

Static analysis result for SHA-256 57568cafc5a7816d…

MALICIOUS

PDF

34.2 KB Created: 2021-06-29 22:34:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 37a0f730242ef76ad1e1d8ed0786ac4e SHA-1: d608fb0954dd71ff90eefb04859a36cd56c57ae1 SHA-256: 57568cafc5a7816d1beacd2773b9fde54df5df1fbf818963d7af67fc64084e23
122 Risk Score

Malware Insights

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

The PDF document contains multiple links and calls to action related to game hacks and currency generators, specifically for Roblox and Coin Master. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the presence of numerous related URLs strongly indicate a social engineering attempt to direct users to potentially malicious sites. The ML classifier also flagged this PDF as malicious with high confidence.

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.co/app/431946152/codes-for-roblox-free-robux-game-hack PDF link annotation
    • http://empresa-venta.hr/files/how-to-join-roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/money-cheats-roblox-cmd_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/toolbox-for-minecraft_GM479516143.pdfIn PDF document text
    • http://empresa-venta.hr/files/roblox-hack-2021_GM431946152.pdfIn macro / runtime command snippet
    • http://empresa-venta.hr/files/how-to-hack-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-back-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-coins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-hack-extension_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/give-free-robux_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/me-hackearon-la-cuenta-de-roblox_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/roblox-old-avatar_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/claim-free-robux-today_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/hack-roblox-jailbreak-auto-arest_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/toolbox-foIn 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_off00002f12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F12 22308 bytes
SHA-256: cbe2f8a2f38c8944d0a53a40e8c6c0722d07abba6cc73f31c9dd2378404b1cc8
font_01_sfnt_off000060a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A9 18964 bytes
SHA-256: 582933343d0b50a5272a19219d05119f66c4490f3bf62618d5b39949d1c5d0d9

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