Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bca06e4ba5c55cf…

MALICIOUS

PDF

44.9 KB Created: 2021-06-08 08:48:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bc0bebd67f2b8c496f3024edb125d9b6 SHA-1: 6c69d22bb26ec997b976a302c89fc5b43ded2848 SHA-256: 6bca06e4ba5c55cf0a9c8cb8d5d50f87e5c20f4247dcd06900ae5ce72c6d8787
160 Risk Score

Malware Insights

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

The PDF contains a lure related to game hacks and redirects to a known malicious URL. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/what-is-the-best-hack-to-get-robux-game-hack In PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-real_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-hack-coin-master-with-game-guardian_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/robux-game-com_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/pubg-uc-wholesale_GM1330123889.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-daily-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/static-moonactive_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/cheats-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-spins-coin-master-no-survey_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
stream_004_off00005270.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5270 25328 bytes
SHA-256: 8fe7a1b421d20aa40d88522cd65844f1f5f14bee4200b90333c05e172029c1fa
font_01_sfnt_off00008b95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B95 18716 bytes
SHA-256: 593d6440f27a328e6c10d5aaf295345ddf932e753b8abb1c86da66984db3a45e

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