Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4567895f3d7d2a7…

MALICIOUS

PDF

32.6 KB Created: 2021-07-06 11:40:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a82dbceee4cb350d801b69df32d7269b SHA-1: e2d0cc0882975d7ee60b8c66b89c468c672b070b SHA-256: e4567895f3d7d2a73f9cae8432b19a3e6a625c1a508ced4cc380552be8dc323e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'free generators' or 'game hacks' for popular games. The ML classifier strongly flagged this PDF as malicious, and heuristic rules indicate it links to known malicious redirectors. The primary IOC is the redirector URL, which likely serves as a lure to a phishing or malware distribution site.

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/431946152/dailyrobux-game-hack In PDF document text
    • http://library.thamrin.ac.id/repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/roblox-demon_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/get-robux-now_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-gold-cards-free-2021_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-fun-free-spins_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-hack-ios-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-download-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/rewards-robux_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-robux-discord-servers_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_off00002c66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C66 21060 bytes
SHA-256: bcf75a1388bf4a331ab9728e8e41f8bde189ccac0709ef0f63d1e301f43922f8
font_01_sfnt_off00005a0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A0C 19092 bytes
SHA-256: 319a3b741e60406540a19adb70d742732d8bf817a9bc58f36e4d58ba7e1a6a2d

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