Malicious PDF — malware analysis report

Static analysis result for SHA-256 21f0bc2afe0ec5ca…

MALICIOUS

PDF

35.7 KB Created: 2021-07-04 05:32:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7af5f2b81d7d26b73da21f39e9f79c87 SHA-1: d111bb8502dbbe1c32980c32498b4bbe06f0ea5d SHA-256: 21f0bc2afe0ec5ca4d94ba3d726e482a975536e53ca26beaa51195d97020dbfe
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirector infrastructure, specifically http://netcdn.tw/app/835599320/free-tiktok-likes-no-human-verification-or-downloading-apps-game-hack. The document body and embedded links suggest a lure for 'game hacks' or 'free items' to entice users to click through to potentially malicious sites. No scripts were extracted, but the presence of embedded URLs and the nature of the lure indicate a phishing or social engineering attack.

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/835599320/free-tiktok-likes-no-human-verification-or-downloading-apps-game-hack In PDF document text
    • https://eyeonhimalaya.com/userfiles/files/free-minecraft-client_GM479516143.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/free-roblox-card_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/free-roblox-intro_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/i-need-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/roblox-gang_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/how-to-hack-into-roblox-accounts-on-android_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/how-to-play-coin-master_GM406889139.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/hacks-roblox_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/minecraft-free-download-ipad_GM479516143.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/www-robux-com_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_off000034d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34D5 22116 bytes
SHA-256: 88f66a823265b961c2994357afc42cc06a09d6555b0eb4858faf9864d07758c3
font_01_sfnt_off000065f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F6 19260 bytes
SHA-256: 26817b4cedfa85687dbcd5cd5fe0b6768af480ef1d18351329c732120202e544

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