Malicious PDF — malware analysis report

Static analysis result for SHA-256 c119d02b3dfd9b93…

MALICIOUS

PDF

33.6 KB Created: 2021-07-05 04:33:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7ae77b74b1e3c1e9c77d533e25121d99 SHA-1: 1d75503764d3c327441fbde180e9adfe731c926e SHA-256: c119d02b3dfd9b931a1868b159cc2a03bf1d8f28c0d5e424e3053905668f3725
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one identified as a malicious redirector, which is designed to lure users into clicking on game hack or free coin generators. The document body explicitly contains the URL http://netcdn.tw/app/406889139/free-coins-2021-coin-master-link-game-hack, which is associated with a game hack lure. This suggests the document's primary purpose is to facilitate the download of a second-stage payload or redirect the user to a malicious site.

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.tw/app/406889139/free-coins-2021-coin-master-link-game-hack In PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-free-spin-whatsapp-group_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/how-to-hack-roblox-to-get-unlimited_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/free-robux-hack-no-games_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/ho-wto-hack-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-rare-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/hacker-roblox-portable_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/free-roblox-account-giveaway-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/artmoney-speed-hack-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/roblox-hack-apk-download-android_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/song-id-for-free-money-cardi-b-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/how-to-get-free-cars-in-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/roblox-hacks-for-free-robux-2021-febuary_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/roblox-hackprogamers-com_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/hack-my-spins-coin-master_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_off00002d6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D6B 22424 bytes
SHA-256: 4962b9b3a25ce325935f0473c0f4095e28177b8461d0601a96a59258908541af
font_01_sfnt_off00005f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F6F 18568 bytes
SHA-256: 5e861a0e572dbf32673aad63aa93fdae762a4856b6734d785bb47208e55cd156

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