Malicious PDF — malware analysis report

Static analysis result for SHA-256 1969487a6af7942e…

MALICIOUS

PDF

47.0 KB Created: 2021-06-03 21:08:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e23cef7afada85314b5426385acc158b SHA-1: cb62f78db195dd3192a4089f822fdcdba20a4405 SHA-256: 1969487a6af7942ead410e2a8307988d1614be8fa88564f6edd247027a775230
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generator' or 'game hack' lures. The document body, though heavily obfuscated, contains references to game hacks and VPNs, reinforcing the lure. The primary malicious link identified is https://netcdn.online/app/479516143/free-vpn-for-minecraft-game-hack, which likely serves as a gateway to a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.online/app/479516143/free-vpn-for-minecraft-game-hack In PDF document text
    • https://kojak-group.com/userfiles/files/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/how-to-get-java-minecraft-free_GM479516143.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/what-tiktok-free-views-app_GM835599320.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-hack-progamers_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-tiktok-followers_GM835599320.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/hack-coin-master-apk-358_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-spin-coin-master-today_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/collect-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/roblox-comroblox_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-robux-images_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-outfits-roblox_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-hack-ios-download-2021_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/strucid-aimbot_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/orewards-com-free-robux_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_off000052d7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52D7 25252 bytes
SHA-256: e15361daeab23939959f0ff236363a386a1a82c659095d5ae621b8f65ae19d7b
font_01_sfnt_off00008c1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C1A 2820 bytes
SHA-256: 96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689
font_02_sfnt_off000095bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95BB 18020 bytes
SHA-256: 911504367fe567166c33f6e3692a77db00fa7c0328364f4a395a35c32f792d6f