Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6212e46808ee4be…

MALICIOUS

PDF

33.7 KB Created: 2021-06-22 22:39:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 83c2fba205a3e88347b1ec435b7bb4ff SHA-1: 7e36d7a049fd6170e703696846011fdf3c640d3b SHA-256: b6212e46808ee4be2460f3a5b86f83ee3283a36e66f7647e0f6362094d0509ca
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple embedded URLs and a heuristic firing for an external URI, indicating an attempt to redirect users to download content. The document body, though truncated, references game hacks and blueprints, suggesting a lure for potentially unwanted or malicious software. The ML classifier also strongly flagged this PDF as malicious.

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/roblox-plane-blueprints-free-game-hack In PDF document text
    • https://dolphintour.vn/images/uploadsfiles/free-followers-on-tiktok-no-human-verification_GM835599320.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/coin-master-hack-ios-download-2021_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/how-to-get-free-pets-on-pet-simulator-roblox_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/descargar-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/tiktok-free-download-2021_GM835599320.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/robux-offer-wall_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/free-old-roblox-games_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/free-roblox-cards-pin-number_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/roblox-vehicle-simulator-xp-hack_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/roblox-studio-cheat-sheets_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/roblox-phantom-forces-cheats_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/free-robux-co_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_off00002e43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E43 21620 bytes
SHA-256: e40b0dd71af387a2bcc902ae2b038686f5cf6cd0f74a7542b9f922d0e0141819
font_01_sfnt_off00005dff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DFF 19344 bytes
SHA-256: efb8ccfa8aafd235e1e2f4337bf40fbfacfc3288005d173f135c4ee439db61ed