Malicious PDF — malware analysis report

Static analysis result for SHA-256 548cfe1cc97a113d…

MALICIOUS

PDF

34.6 KB Created: 2021-06-29 03:39:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0ef71ac18530b9ae22591e50180e529a SHA-1: ccce77f8d8f41fbeec70fb8e720147a39f906ce6 SHA-256: 548cfe1cc97a113dadfb93091ae10454a26303229bd5119fa320a0018d9ef121
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free Robux and game hacks to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, likely serving as a gateway to further malicious content or malware. The document's structure and embedded URLs strongly suggest a phishing or scam attempt designed to exploit user interest in online games.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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-robux-inspect-hack-game-hack In PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/roblox-account-hacked-no-email-address_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/codigo-oculto-roblox-hack-roblox-tener-roblux-gratis_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/how-to-get-free-robux-using-startingploit_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/synapse-roblox-exploit-free_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-robux-group_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/how-to-hack-roblox-on-kindle-fire_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/change-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-roblox-redeem-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/roblox-free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-clothes-roblox-catalog_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/roblox-zombie-rush-hacks_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/roblox-da-hood-hack-script_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/roblox-meep-city-how-to-get-free-coins_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/coin-master-free-daily-spins_GM406889139.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_off00002fec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FEC 22464 bytes
SHA-256: 30aef7e4aba77fe38504b633afc7fddbbdc9c9b0b22d2c1df2f739dc2b4fec3a
font_01_sfnt_off000061f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F6 19076 bytes
SHA-256: e61ca334002d1bf6feeb56a135517f3078628df02d5f3881bbbab3917b65d262

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