Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffa8270dc41c0f42…

MALICIOUS

PDF

34.1 KB Created: 2021-06-30 21:28:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3ebf4ca47a57004ea9a1eb201979b5b7 SHA-1: c96b3fbfdac17d70c70c1472778c5828e34d2ef0 SHA-256: ffa8270dc41c0f4202dbaa46919064a9b1fdbe5fa0bf2bf15213e13d2c58c808
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures related to game hacks and free currency, specifically mentioning Roblox. It links to a known malicious redirector infrastructure at http://netcdn.co/app/431946152/ways-to-hack-roblox-accounts-game-hack. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

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/ways-to-hack-roblox-accounts-game-hack In PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/how-to-kick-someone-in-free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/roblox-cheat-engine-game-shutdown_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/roblox-girl-outfits-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/roblox-accounts-for-free-with-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/minecraft-free-android_GM479516143.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/cheats-for-roblox-pokemon-brick-bronze_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/assassin-roblox-hack-script_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/on-roblox-how-to-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/free-robux-july-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/how-to-get-roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/free-robux-cheats-no-survey_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/free-robux-come_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/how-to-make-sure-your-roblox-account-doesnt-get-hacked_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/how-to-insert-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/roblox-free-robuks_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/downloaf-free-roblox-robux-codes_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/hacker-shirts-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/how-to-cheat-on-roblox-2021_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_off00002ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF1 21716 bytes
SHA-256: dbbe6cddaa1295521ee6e24133279b89e512a266173b39f088c8776577d3868b
font_01_sfnt_off00005f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F70 19280 bytes
SHA-256: cf7eeacff1a03aa9b0b72b7fe15f9fc87ec1cecfe18464fedf85763e87c08995

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