Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebbd224923b6a843…

MALICIOUS

PDF

32.8 KB Created: 2021-07-09 10:35:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7a8c64e9dcb61c860639c0166b345158 SHA-1: e72c1c7403d800c162348a4bd92925a399f5ab8e SHA-256: ebbd224923b6a843875381aff94cf713f9a6d9d2e63f46d2d04a08ae91598d41
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that explicitly advertises 'free spins' and 'hacks' for popular games. The ML classifier strongly indicates maliciousness, and the presence of external URIs suggests the document is designed to redirect users to potentially harmful content or download sites. No scripts were extracted, but the overall pattern is consistent with a phishing or malware distribution lure.

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.tw/app/406889139/free-spins-coin-master-2021-game-hack In PDF document text
    • http://astdubai.co/userfiles/files/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/hacks-to-get-money-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-spin-link-free_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-minecraft-account-reddit_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/cm-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-hack-android_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-roux-roblox_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-ftw_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/spin-coin_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-hack-tool-no-human-verification_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-disney-plus-accounts-tiktok_GM835599320.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-how-to-make-a-cool-avatar-free_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-hack-ga_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_off00002b97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B97 22032 bytes
SHA-256: f1017b636b503b9daa83db69a10b40d5619e9dc53fa05027b84182c11f58d41a
font_01_sfnt_off00005c81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C81 18576 bytes
SHA-256: 461056571ca453647e3c969961301e9f27cf934f5ba6ca99c4dfe7c56792b440

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