Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5022e4b24b4fd78…

MALICIOUS

PDF

33.6 KB Created: 2021-07-04 11:42:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f97a710015e60b4a33b52baf7cfb6919 SHA-1: 8fe850c1dae4bb42a508b9ebf1fe71f48b673c62 SHA-256: b5022e4b24b4fd780aadeb09fe21342f034e44bc7459b8753f683e0cb671d3fd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'free generators' and 'game hacks' for popular games like Minecraft and Roblox. The primary redirector URL is http://netcdn.tw/app/479516143/minecraft-hack-app-game-hack, which is flagged as malicious. The document body and embedded URLs suggest a lure for users seeking cheats or free items, likely leading to phishing or malware download sites.

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/479516143/minecraft-hack-app-game-hack In PDF document text
    • https://ciudadata.ec/images/ckfinder/files/coinmaster-free-spins-link_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/roblox-case-clicker-hack-download_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/coin-master-free-spins-8-14-2021_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-robux-23rd-feb-2021_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/coin-master-free-spins-link-31-march-2021_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-boombox-roblox-gear_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/how-to-get-a-group-for-free-roblox_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/minecraft-free-download-2021_GM479516143.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/google-roblox-games_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/how-to-hack-roblox-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/roblox-assassin_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/is-pokemon-free_GM1094591345.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-free-robux_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/download-roblox-for-free-unlockable_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_off0000319c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x319C 21680 bytes
SHA-256: 1f92b0910a6bf86fafe95e180272e808dd4a00b350947b2e766829758d5d40f6
font_01_sfnt_off00006121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6121 18204 bytes
SHA-256: c1185779461864b36b9820a1fc6c8f9e9cb6b26e9ea910c27505907d0185e4b6

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