Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fcf121f10ce2e21…

MALICIOUS

PDF

34.0 KB Created: 2021-07-05 18:05:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3d7ce5bdd8c13a4f1c189e08d2b59538 SHA-1: e76869ba13e60e92d1fdd0af799754056a3b576d SHA-256: 7fcf121f10ce2e21495e91105736f8bed2b4062efb89214fba6e369bd85c195d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and free currency lures. The ML classifier strongly flagged this PDF as malicious, and the presence of a download button heuristic further supports a malicious intent. The document body contains embedded URLs that are consistent with these lures.

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/windows-10-minecraft-hacks-game-hack In PDF document text
    • https://www.jjpremiers.com/files/cheats-for-bear-roblox_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/coin-master-hack-without-verification-for-iphone_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/join-my-group-for-free-robux_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/how-to-get-free-robux-banana-website_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/roblox-big-paintball-hack-website_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/cheat-roblox-lumber-tycoon-2-fly_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://www.jjpremiers.com/files/discord-roblox-cheat-fr_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/denis-daily-robux-hack_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/roblox-bubble-chat-hack_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/synapse-roblox-free_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/coin-master-lucky-patcher-hack_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/coin-master-free-blogspot_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_off00002ffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FFA 21768 bytes
SHA-256: f1d95375456cfa0fb9659f8fdae4709505aba5c83790dec571b1dba3d7b20ff3
font_01_sfnt_off00005fd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD9 18980 bytes
SHA-256: 03214c18f960a48cbd31d6f5bef257b62caa9c5e4674619e4c22a7c51e90e08f

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