Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bbc67f793dbea2f…

MALICIOUS

PDF

48.9 KB Created: 2021-06-11 11:58:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c37655d2b6751c27722b27758278715f SHA-1: c78b299797fb90c5cd754ad221d0ca8005272004 SHA-256: 6bbc67f793dbea2f7b550850cf41f84813680f329283316f9cb4a97a41365921
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, disguised as a "free generator / game hack". The document body and embedded URLs reinforce this theme, suggesting a lure to trick users into visiting malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded links strongly indicate a malicious intent to redirect users to potentially harmful content or initiate further downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.tw/app/431946152/how-to-make-your-own-robux-hack-game-hack In PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-real-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-kill-aura_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-mod-menu-apk_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-hack-coin-master-using-es-filer_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-unlimited-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-minecraft-mods-for-ps4_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-do-you-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-pacifico-how-get-free-premium-car_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-quora_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/hack-coin-master-2021-pc_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000529e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x529E 27500 bytes
SHA-256: c56f12abc4fdec7d37e6625b9e1fdce6663b399499a9cbae4f2b6438fc19d817
font_01_sfnt_off00009153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9153 2820 bytes
SHA-256: d88f25cfe237a714f996150a11dd8a058f0f7c3e9d1ae91c17b46c10409b6c0b
font_02_sfnt_off00009aee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AEE 18768 bytes
SHA-256: b1c05c46deb43bac8d2905585e1eb224a8bae0f7c6823eb75f5c46627bda6b86

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