Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbbd6a88f57a6db7…

MALICIOUS

PDF

30.9 KB Created: 2021-07-07 09:16:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b7472746743dc8b97ede3bb4efbd8845 SHA-1: 2e0e734a3d5ad5c7c9b0e6d8dade05ec3afebc2d SHA-256: bbbd6a88f57a6db7168c3793fe4360b953216f7b6786726f10bb3c7f8d05ad2a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and embedded URI heuristics indicate this PDF is malicious. The document body contains lures for game hacks and directs users to download applications from external URLs. The presence of embedded URLs suggests an attempt to download and execute a second-stage payload, likely a trojan or downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9774

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/1330123889/pubg-uc-hack-2021-game-hack In PDF document text
    • http://www.sbairs.com/datas/files/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-3533-android-hack_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/impact-roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/como-hackear-el-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/how-to-hack-robux-on-ipad-2021_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/how-to-get-free-robux-on-roblox-youtube_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-hack-apk-35-8_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/moonactive-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/working-robux-hack-without-a-human-verification_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_off00002577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2577 21736 bytes
SHA-256: 7fcc6a597044814f491b1d55ba3378f0866772d2ac2c82db5ce0837d59702a2d
font_01_sfnt_off00005505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5505 18696 bytes
SHA-256: 374153c47e5e01c31b3980ea17477b5fd2b270a1bd8b0b075f3af3290d2048bd

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