Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9ddbe3784d5b712…

MALICIOUS

PDF

33.4 KB Created: 2021-07-03 16:40:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 86a1ac42e85a9883cd44cec05d495726 SHA-1: 745eea4791f3577ea144b6dcc86ea8856a29fbd2 SHA-256: b9ddbe3784d5b7129bb63b210f23793bb9379f1fd441778b899e9e1d1686143f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting game hacks and free currency generators. The primary lure is 'Coin Master Free Spins Link Deutsch Ios', directing users to a URL associated with malicious redirectors. This suggests a social engineering tactic to trick users into visiting potentially harmful sites.

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/coin-master-free-spins-link-deutsch-ios-game-hack In PDF document text
    • https://cleansui.com.tw/image/data/files/free-gui-roblox_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/how-to-hack-coin-master-game-2021_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/coin-master-free-spins-link-2021-twitter_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/give-me-robux-now_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/pokemon-go-free-revives_GM1094591345.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-robux-without-having-the-vera-cage_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/coin-master-daily-spin-link-app_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/coin-master-code-hack_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-account-generator-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/coin-master-free-spins-link-ios_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/fbchampion_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-spins-coin-master-android_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002d4a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D4A 22156 bytes
SHA-256: e649e59113feb84364101cbb430cad1962e0b790a69f1eaed0902ac66c56bd6b
font_01_sfnt_off00005e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E83 18820 bytes
SHA-256: 0df7f73f5dc751554d445504aa4a2634324aac68e74bdfd62cfd74053bcb9575

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