Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9d9822f46877ac6…

MALICIOUS

PDF

33.4 KB Created: 2021-06-22 16:12:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6d56ca5ba1b34c9b4dfe133338b29436 SHA-1: 1ce5c3b92b78317dec76da8bb04ea7242ffb02cb SHA-256: d9d9822f46877ac6c6dd1cbf5aed427bcfe9481c3b31873087ec72e57c2ad45c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirectors and other malicious PDFs, masquerading as game hacks and generators for popular games like Roblox and Coin Master. The primary redirector URL is http://netcdn.co/app/431946152/roblox-fly-hack-mobile-game-hack, which likely serves as a gateway to further malicious content. The document body and heuristics confirm a lure-based attack pattern designed to trick users into downloading potentially harmful files.

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-fly-hack-mobile-game-hack In PDF document text
    • https://domc.tw/upload/files/how-to-get-any-gamepass-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/free-robux-generator-download-2021_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • https://domc.tw/upload/files/how-to-get-free-obc-and-robux-in-roblox_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • https://domc.tw/upload/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/free-obc-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/what-is-wurst_GM479516143.pdfIn PDF document text
    • https://domc.tw/upload/files/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/coin-master-golden-cards-hack_GM406889139.pdfIn PDF document text
    • https://domc.tw/upload/files/bux-free-robux_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/how-to-hack-jailbreak-money-roblox_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • https://domc.tw/upload/files/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
    • https://domc.tw/upload/files/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • https://domc.tw/upload/files/free-robux-real-real_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_off00002d5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D5B 21568 bytes
SHA-256: f592ef018015988facfe18639d95c870621d04ccddbfc74eaa0c977d1e8e300d
font_01_sfnt_off00005cb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB5 19316 bytes
SHA-256: 0071141fe365dac35d9e990cc5766fabb39f4c98d9e1fa3f8669c38da0f819b9

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