Malicious PDF — malware analysis report

Static analysis result for SHA-256 9be9bbed81610dc4…

MALICIOUS

PDF

44.8 KB Created: 2021-06-04 03:42:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c5215b88ca09a815d0abb658aaebd8f7 SHA-1: c909f4ac9543f257bbfae4cd65a8425baf82a17e SHA-256: 9be9bbed81610dc495764de3c8f679bb80ec6d052de760d2ed4e64395d141598
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including a known malicious redirector, masquerading as game hacks and generators. The document body, though partially corrupted, contains references to 'Roblox Hack' and a URL that aligns with the heuristic findings. The presence of embedded links and the lure of free in-game items strongly suggest a phishing or credential harvesting attempt.

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.online/app/431946152/how-to-use-scripts-in-roblox-hack-game-hack In PDF document text
    • http://library.acehresearch.org/repository/roblox-games-with-free-boombox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/como-hackear-coin-master-gratis_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/original-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-game-hack-apk_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/tiktok-free-7-day_GM835599320.pdfIn PDF document text
    • http://library.acehresearch.org/repository/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-daily-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-points_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-coins_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-coin-and-spin-app_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-village-cost_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/tiktok-viewer-free_GM835599320.pdfIn PDF document text
    • http://library.acehresearch.org/repository/robux-hack-free-robux_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
stream_004_off00005033.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5033 25180 bytes
SHA-256: 8452b9917ae099ed389d4ebdb6c4372df47d6e53bdf1abacf2417c4d5a6faf9a
font_01_sfnt_off00008a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A82 18932 bytes
SHA-256: fce9e652f89a1af62f774ff2b7937cf54d78de2903c3939778e1916a8682391a

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