Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bfc0d5713f3446f…

MALICIOUS

PDF

33.9 KB Created: 2021-06-21 01:06:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 524a1a530e6c796c63ae43fc84539281 SHA-1: 192e2b768aeb30e952d0e6344b2e3206c5c14a9e SHA-256: 0bfc0d5713f3446ffd532ba0efe77eecf35823992887194c8dce273562c76eb7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, disguised as 'free generators' or 'game hacks' for popular games. The ML classifier strongly indicated maliciousness, and the document body confirms the lure. The primary attack pattern involves redirecting users to potentially harmful content, likely for credential harvesting or further malware delivery.

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/youtube-roblox-how-to-get-free-obc-game-hack In PDF document text
    • http://www.manchieu.vn/upload/editor/files/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/generate-free-robux-gnome_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/100-robux_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/rape-simulator_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/coin-master-free-spins-today-39_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/2021-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/hack-download_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/wurst-112_GM479516143.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/free-roblox-acc_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_off00002ea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EA1 21952 bytes
SHA-256: e70c3135d4a4e23b20da82ea113c27b3a794d07d181882ad21e3b3a72e6f7187
font_01_sfnt_off00005ef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF5 19220 bytes
SHA-256: 3d597a497a412394bffcc4a374628475db7fff6f6e1c4afaa72a70884973ffc0