Malicious PDF — malware analysis report

Static analysis result for SHA-256 af2d350bf3dff20f…

MALICIOUS

PDF

43.1 KB Created: 2021-05-14 01:56:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-21
MD5: 43b9edbf0a67b5ad1768e25ae594513b SHA-1: 0066f3d71eebf818bad005624423b1112b619452 SHA-256: af2d350bf3dff20f59bce51bb11930533ce80be3a790647c054610af1341410e
180 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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.xyz/app/406889139/free-coin-app-game-hack In PDF document text
    • http://tckontrola.hr/files/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/free-attacks-on-coin-master_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • http://tckontrola.hr/files/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://tckontrola.hr/files/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • https://tckontrola.hr/files/coin-master-free-spins-and-coins-for-iphone_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/how-to-give-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • http://tckontrola.hr/files/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/coin-master-3533-android-hack_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://tckontrola.hr/files/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • https://tckontrola.hr/files/coin-master-cheat-codes_GM406889139.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_003_off00004804.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4804 23860 bytes
SHA-256: 78c87fcfd66de4714365d85601d4c3cb8553633ddbcc9c14e9a2badd9bf36a14
font_01_sfnt_off00007e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E16 2944 bytes
SHA-256: e8dca988325d5b5adea380508eed68725fcb814536e93cd420f224b7166adc23
font_02_sfnt_off00008842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8842 17552 bytes
SHA-256: 3e821414a1aa04839473d5e3e49ecd37671cffeae8faf9e4bac32a085a39f5e4

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