Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a2efa0881bd00c2…

MALICIOUS

PDF

35.0 KB Created: 2021-06-27 23:55:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 73921dc6d4f3ff66712219f6f57edffe SHA-1: f3f9117efd0485b1ee9d7ad013a93730648d2737 SHA-256: 3a2efa0881bd00c2b16e456e900b385a2e3b30703185265d11f3dd2afe0a6cfa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs that redirect to malicious infrastructure, specifically advertising game hacks and generators. The document body and heuristics indicate a lure to download or access these 'hacks'. While no scripts were extracted, the presence of malicious redirectors and the lure suggest an attempt to deliver a secondary payload or phish for credentials.

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/face-added-by-hacker-roblox-game-hack In PDF document text
    • https://cleansui.com.tw/image/data/files/ios-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/fan-page-coin-master_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/free-coin-master-spins-no-verification_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/roblox-free-giveaway-live_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/roblox-mods-for-free_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/coin-master-hack-mod-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/gamepass-hack-roblox_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/free-roebucks_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/wwwcoin-master-free-spincom_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/coin-master-unlimited-coins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/what-is-robux-in-roblox_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_off0000307d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x307D 22700 bytes
SHA-256: 100e2b1ac78b8504ec4240e36be6de24d197b46d4faaa8430dee96da1f1a7937
font_01_sfnt_off0000635f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x635F 19172 bytes
SHA-256: 97c0f2be6f71ed568ea28c10c2500503e6fcb29a21d20ff800a18750b058fcaa

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