Malicious PDF — malware analysis report

Static analysis result for SHA-256 80a88e2da21b959e…

MALICIOUS

PDF

33.1 KB Created: 2021-06-24 16:23:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fd75fafaffe9766d8cdcf56428740194 SHA-1: c66548c46833ca6cc8a0b6fc7585944fe4a2b8f0 SHA-256: 80a88e2da21b959ef614236e006557e568a6578773906d9bb4d4286a7e8ec067
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and generators, specifically for 'Coin Master'. It contains embedded links that redirect to malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The primary malicious URL identified is http://netcdn.co/app/406889139/coin-master-hack-2021-app-game-hack. The document's structure and embedded URLs suggest it is designed to trick users into visiting potentially harmful sites, likely for further malware delivery or phishing.

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/406889139/coin-master-hack-2021-app-game-hack In PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-latest-version-hack_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/claim-free-robux-game_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-hack-2021-app_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/uirbx-club-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/https-www-free-robux-com_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/chreck-cashed-v3-roblox-hacking_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-hack-pc-download_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-robux-hack-us-2021_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/robux-command-hack_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/roblox-studio-hack-message_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-roblox-app_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_off00002e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E7A 21512 bytes
SHA-256: 97e3b43a0d5c7f8e0756df789d902258ac2c2726bea6c350c1593dbc296c8b67
font_01_sfnt_off00005da6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA6 18580 bytes
SHA-256: 9ee7f6e729eaa8ccfa60f836f488dcd9dbdf367b2dcb4736acc286b6369c8b6e

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