Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dba68fc83643250…

MALICIOUS

PDF

49.3 KB Created: 2021-06-07 08:25:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a3f3b0c3831ee81280da2735eae30038 SHA-1: af5696acb81b05f88fecd64cb2f2f5686d1e4878 SHA-256: 6dba68fc836432501a2fc8c8f6314995545339f53c4b383cb65cdf96dbdd68d2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as offers for game hacks and free items. The document body and embedded URLs suggest a lure for popular games like Roblox and Minecraft, aiming to trick users into clicking through to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/roblox-games-free-online-for-kids-game-hack In PDF document text
    • http://cornerwebstudio.com/images/cone-master_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://cornerwebstudio.com/images/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-minecraft-domain_GM479516143.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-views-on-tiktok_GM835599320.pdfIn PDF document text
    • http://cornerwebstudio.com/images/claim-robux_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-minecraft-gift-card_GM479516143.pdfIn PDF document text
    • http://cornerwebstudio.com/images/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://cornerwebstudio.com/images/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/how-to-hack-roblox_GM431946152.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_off000050f7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50F7 26572 bytes
SHA-256: 65f9205b9283ccd5756df12bbb9b979b6d79533018bf3d93d8a166143051afcb
font_01_sfnt_off00008f89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F89 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009c9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C9A 18728 bytes
SHA-256: 7c7857d2b11f185ff989a789858740435f2b292226578cc65c0f25a427ea87ed

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