Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cf577b29e7def02…

MALICIOUS

PDF

34.5 KB Created: 2021-07-02 03:54:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3bf4deb8d2c1c87572214d3e5e739bf8 SHA-1: e2b82fd503fcef131d0167f7753fc8abde54c1e6 SHA-256: 5cf577b29e7def02ffe2023ff83fce69f3a62a305e94093ffac4834e6e60d5e3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'free currency' for games like Roblox. The ML classifier also flagged this PDF as malicious. The primary lure appears to be a deceptive offer to obtain in-game items, leading users to a malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/roblox-cheat-codes-for-money-xbox-one-game-hack In PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/google-how-do-you-get-free-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-summer-rewards_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/robux-live-stream-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/rewardex-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-finish-obby_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-deutsch-free-download_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/new-free-robux-unlimited-free-robux-no-save-buy-proof_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/hacks-roblox-scripts_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-robux-for-free-hacking_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-free-robux-on-roblox-2021-no-hacks_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-free-online-virtual-world-game_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/no-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-free-robux-by-roblox_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_off00002fa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FA0 22088 bytes
SHA-256: d6b3d52a743d48f44f3109e43f777292745826441ae8bebd4318ceb84c29becc
font_01_sfnt_off0000607d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x607D 19468 bytes
SHA-256: 0fd3657aed02787ca983b2b04985f6a97931ab16fc150591be2040279e4ed83d

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