Malicious PDF — malware analysis report

Static analysis result for SHA-256 a110e9014cba4682…

MALICIOUS

PDF

51.6 KB Created: 2021-06-04 03:51:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e253a1039ee6e3e4186ee673997ba56f SHA-1: b9dad83a8ff59f876eaa97af5da078de14346c17 SHA-256: a110e9014cba4682bf98b22c31eb36ee9ef5939cda1ea12feba21a7295e7893f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting "free Robux" and "game hacks". The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the document body and heuristics indicate a social engineering lure designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9464

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-get-free-robux-no-survey-game-hack In PDF document text
    • http://library.yamasi.ac.id/repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-hack-apk-link_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-200-spin-link_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/minecraft-login-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-minecraft-gift-codes_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/spin-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/roblox-trolling_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-hack-pro-gamers-com_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052b8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52B8 24680 bytes
SHA-256: 36dbcc1a2a2c69e77a9f66e4dbcafd341f4075d846fb3cd25821905cbc879e3e
font_01_sfnt_off00008b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B5A 8132 bytes
SHA-256: 7b13f62dd83f6e5b39d850f66139f44fff841e4e695f86fdfbe4d5a2de470bf2
font_02_sfnt_off0000a64b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA64B 18576 bytes
SHA-256: 4e9b11cd56806b44a111e59337afa2364f0ba527e2b4797dd95234ca7f902292

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