Malicious PDF — malware analysis report

Static analysis result for SHA-256 bff4db40d828ad2f…

MALICIOUS

PDF

34.2 KB Created: 2021-07-01 09:43:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2ec9a8e1b9bb26884f09fb04a94b585c SHA-1: 35da115c6b7bf43735bed776b2f5c55c3584a851 SHA-256: bff4db40d828ad2f28995560ea25a5c5f8a7d138af5c505c8494a3a5d7c61a10
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, which is designed to lure users into downloading potentially harmful files or visiting scam websites. The document body explicitly mentions 'Free Spins Coin Master Hack' and includes URLs related to game hacks and free currency, indicating a social engineering lure. No scripts were extracted, but the presence of malicious links and the lure strongly suggest a phishing or scamming attempt.

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/free-spins-coin-master-hack-game-hack In PDF document text
    • http://tileworld.com.au/files/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/coin-master-apk-hack-2021_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://tileworld.com.au/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/how-to-hack-in-roblox-2021-fly_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/roblox-weird_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/download-free-robux-laptop_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/how-to-get-free-skins-in-roblox_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/roblox-hack-apk-download-android_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/coin-master-hack-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/how-to-know-if-im-getting-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/coin-master-link-daily-get-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/free-robux-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_off00002e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E83 23092 bytes
SHA-256: 959411a743e4d13c9115ba0d1b1157616bd54ec59161e5ca89d944f6b52e1344
font_01_sfnt_off000062ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62AB 18344 bytes
SHA-256: 8bc6b0cf0eb90f04f987a5ab4f1c5f134b3d28bd64dbb5f1502a7b5244b21d6b

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