Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd8ddb735b8750cd…

MALICIOUS

PDF

46.4 KB Created: 2021-05-14 07:34:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 863cf7ca405871071aa4c4584b9bf2b1 SHA-1: f662cc97928e8acce61f80e52a5ef735bc93c49a SHA-256: bd8ddb735b8750cdb41f1e517e2bd8157a4cff2eb7e7fb3bb94bf0ef11bf98e1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator' or 'game hack' lures. The primary malicious URL identified is https://netcdn.xyz/app/406889139/master-free-spin-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at tricking users into visiting potentially harmful sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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.xyz/app/406889139/master-free-spin-game-hack In PDF document text
    • https://and.co.id/assets/CKImages/files/coin-master-free-spins-and-coins-app-download_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/roblox-its-free_GM431946152.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/coin-master-free-in-app-purchases_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/get-free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/10-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/aimbot-exe-roblox_GM431946152.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/can-i-have-robux_GM431946152.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/minecraft-pe-hack-client-ios_GM479516143.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/play-coin-master-online-free_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/free-spins-coin-master-november-2021_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/cmaster-club-coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/give-me-robux-now_GM431946152.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/how-to-get-free-robux-for-kids_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_003_off000049d6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49D6 29228 bytes
SHA-256: 62dd3beeb414b4abb2cc839f475a79d18a56c612c9d51cb3f7c03889f92e56fe
font_01_sfnt_off000089fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89FA 17744 bytes
SHA-256: f2331a3c380b29fa6924a7d98cc121391afa4585b22bf6708bddf5542bc1013c
font_02_sfnt_off0000aa44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA44 3264 bytes
SHA-256: e32c06502c11b52acb5e814091c5fdbffd1e2a904ac7a9cfb8b5b180bd139088

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