Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e8eee5517be841e…

MALICIOUS

PDF

34.4 KB Created: 2021-06-30 21:57:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5dc303f50473de2d97d1436e8dc96d0c SHA-1: a23fc7a5159e463d999d72489a659edad70b0cd1 SHA-256: 1e8eee5517be841e28b0aca180bca49575c5e3e8db18bcd5feb1dd1c95603cba
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a common lure of 'free Robux' and game hacks to entice users. It contains multiple embedded URLs, including http://netcdn.co/app/431946152/free-robux-with-rixty-game-hack, which likely lead to malicious sites or further download stages. 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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/free-robux-with-rixty-game-hack PDF link annotation
    • https://planetzoe.hr/files/codes-for-skyscraper-tycoon-roblox-that-give-free-money_GM431946152.pdfIn PDF document text
    • https://planetzoe.hr/files/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/i-finally-found-a-game-that-gives-free-robux_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.planetzoe.hr/files/how-to-get-free-robux-by-joining-group-no-buying_GM431946152.pdfIn PDF document text
    • https://planetzoe.hr/files/master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.planetzoe.hr/files/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://planetzoe.hr/files/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • https://www.planetzoe.hr/files/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • https://www.planetzoe.hr/files/coin-master-links-to-free-spins_GM406889139.pdfIn PDF document text
    • https://www.planetzoe.hr/files/free-robux-safe_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://planetzoe.hr/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • https://www.planetzoe.hr/files/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://planetzoe.hr/files/free-robux-just-click_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • https://www.planetzoe.hr/files/free-robux-accounts-youtube_GM431946152.pdfIn PDF document text
    • https://planetzoe.hr/files/robux-hack-2021-phone_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_off00002e74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E74 22352 bytes
SHA-256: 4a5605560105e662b98ccea055aa6f586543131db8eda7305fa92dd368779755
font_01_sfnt_off00006032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6032 19484 bytes
SHA-256: b84e9bdeb0e725863d47c13845faf3634602c33b15f1c9b4c68de549968870b9

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