Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc4dc228e678bdd4…

MALICIOUS

PDF

33.8 KB Created: 2021-06-18 21:01:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 14579b31027a8d2be3507c24c6a3b4ca SHA-1: 503e54042387f51e39d6ea9db6d17c1fd97f6bd7 SHA-256: bc4dc228e678bdd406d9757c696232158d4ece8a618e61e0e1a5acfc42a9454e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to known malicious redirectors, disguised as game hacks and free currency generators for popular games like Roblox and Minecraft. The heuristic firings indicate that these links are designed to lure users into downloading potentially malicious content or visiting further compromised sites. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a phishing or malware distribution 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/431946152/roblox-download-free-chromebook-game-hack In PDF document text
    • http://www.sbairs.com/datas/files/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/minecraft-for-macbook-free_GM479516143.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/how-long-should-the-account-stealing-hack-on-roblox-last_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-pro-hack_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coinmasterfreespinlink_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/is-there-a-free-version-of-minecraft_GM479516143.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/minecraft-app-free-download_GM479516143.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/roblox-a_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/how-can-you-get-robux_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/are-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/codes-how-to-get-free-robux_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_off00002c6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C6A 21948 bytes
SHA-256: f0bbd842281bade2dfc2d8deaa230894f31a59af50fb68eab6ee4969f2f2d07c
font_01_sfnt_off00005ce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE7 19752 bytes
SHA-256: 557b00e1ee6daf0e80eff5b071849457d2ea647ddebb6c71c45057eb0be40219

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