Malicious PDF — malware analysis report

Static analysis result for SHA-256 af23404395bfd8d2…

MALICIOUS

PDF

33.4 KB Created: 2021-07-04 10:22:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-21
MD5: 0bf3d5a88ae8fa9fddda40b9675c6ad5 SHA-1: 8e65d477d90f9aa2e00c2fc438bf3f686c55dfcf SHA-256: af23404395bfd8d2aca268f7ca9ed10516efd1b87f21c08ca9c48630b7311fe0
160 Risk Score

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/406889139/coin-master-gold-cards-hack-game-hack In PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/free-robuxs-trackid-sp006_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/free-likes-for-tiktok_GM835599320.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/free-aesthetic-clothes-roblox-youtube_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/minecraft-modded-client_GM479516143.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/cool-robux-hacks-lol_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/free-roblox-account-giveaway-with-robux_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/coin-master-hoe-to-get-extra-free-spins_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/how-to-get-free-robux-and-tix-on-pc_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/skin-roblox-girl-free_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/minecraft-wurst-client_GM479516143.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/free-admin-thumbnail-roblox_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_off00002dc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DC2 22528 bytes
SHA-256: 49466a8ca3277da773cba1eaf7c05a877436b0b9ef486a8833c354bb09663c70
font_01_sfnt_off00005fd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD1 18252 bytes
SHA-256: 86d208c87cd9723521760f39289724e0803f9f68e91a8c51082ac7ab23afa3dc

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