Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f593eef6fb1a51a…

MALICIOUS

PDF

34.9 KB Created: 2021-07-04 13:31:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c449dae53624896967078b280a6aeb18 SHA-1: 5b8e73d0bb2177c7a7f9b6bfb8d67727a1b3c7d8 SHA-256: 7f593eef6fb1a51ac914a1c4baf15fe28b8427ebd4296dedbe0a809c36c2a2e8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a malicious domain, likely as part of a phishing or scam campaign. The primary lure appears to be related to game hacks and free currency generators for popular games like Coin Master and Roblox. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack.

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-master-cards-game-hack In PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-xyz-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-robux-no-download-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-hack-pro-gamers-com_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/my-roblox-account-has-been-hacked_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-group_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/daily-coin-master-free_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/hacking-john-doe-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/pubg-uc-generator-without-human-verification-2021_GM1330123889.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-roblox-generator-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-for-watching-ads_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/robux-code-2021-free-game_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/lumber-tycoon-money-hack-roblox-2021-february_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/google-how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/counter-blox-roblox-offensive-hacks-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/ho-to-gte-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
stream_002_off00003237.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3237 23224 bytes
SHA-256: 93da5d4212f15c2dfb981efc3972c572137451c484d3d24aba8bcdce35a121a3
font_01_sfnt_off00006693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6693 18008 bytes
SHA-256: 9b1b8022fecd0e698345aa4518e5e5ceb9dfed4ff19bb9e19d156964a7983e20

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