Malicious PDF — malware analysis report

Static analysis result for SHA-256 deee0fb9d81bd1c2…

MALICIOUS

PDF

35.3 KB Created: 2021-07-04 02:41:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 18e5bc739e93828f772984bfcb79b74d SHA-1: 575f0bec61ca999ec4013160b49e8ae64ade8008 SHA-256: deee0fb9d81bd1c2d411fd6e357fd2a835f2975863b9a4ce41e92ec8f8325d60
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The primary redirector URL identified is http://netcdn.tw/app/406889139/coin-spin-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or social engineering attack aimed at tricking users into visiting malicious sites, likely to download further malware or engage in scams.

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-spin-game-hack In PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/coin-master-hack-tuts_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/coin-master-app-for-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/roblox-prison-life-v2-02-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/free-tiktok-fans-no-human-verification-ios_GM835599320.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/roblox-microsoft-rewards_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/free-roblox-level-7-script-executor_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/free-robux-op-rewards_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/minecraft-creative-mode-free_GM479516143.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/pokemon-go-hack-free-coins_GM1094591345.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/pig-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/free-games-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/ash-shirt-kalos-on-roblox-free_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/how-to-get-free-tiktok-followers-without-human-verification_GM835599320.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/roblox-generator-com_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_off000035c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35C4 22792 bytes
SHA-256: ddebe567e1d649347d1f400bddc22728e7406c4d75ad98259da17b77db336c55
font_01_sfnt_off0000689c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x689C 17908 bytes
SHA-256: f5229592472b1750657f28890ca1d0717631de607b64e15ac8a60a13fbd3d795

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