Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af6afd43f3f37f9…

MALICIOUS

PDF

34.8 KB Created: 2021-06-23 14:12:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-06
MD5: 723c4195f91debc1216e266268e53038 SHA-1: d3d6c8b1ad29a4a018d7ecd8b60e5cb489303757 SHA-256: 4af6afd43f3f37f94937bbdcce76d45781a87fc77d4bf01e19f6b8a9aa4b8c83
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.co/app/431946152/how-to-change-your-name-on-roblox-for-free-2021-game-hack In PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-free-spins-link-without-human-verification_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/wurst-client-download_GM479516143.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/how-to-become-unkillable-in-wild-savanna-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/invitation-templates-roblox-free_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/minecraft-pe-apk_GM479516143.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/how-to-get-stuff-for-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-hack-tool-v1-9-download_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-robux-net_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-robux-pastebin-no-save_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/freerobuxno-games-no-sighning-up_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/how-to-get-cloth-goku-free-roblox_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/minecraft-sign-up-free_GM479516143.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_off000030a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30A9 21824 bytes
SHA-256: 637e4f3dbbb70da63d8eb61f44eedfbf8e586533cc3736512f319ab4ad9609e1
font_01_sfnt_off0000606c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x606C 19944 bytes
SHA-256: a15fbc84647a35174b9a3a425296907c71fc7af9668a730b93eff68992424769