Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5ab111e888eb086…

MALICIOUS

PDF

48.1 KB Created: 2021-06-04 00:02:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ad1917afc83d5d556c9992cfc903b7bb SHA-1: adc904ad50df4986092936e3aded5b9712f36d15 SHA-256: e5ab111e888eb0862967a94d877ebc86a23a2d6ff9b6557002bd233da173dc01
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising free Robux or game hacks. The ML classifier also flagged this PDF as malicious. The embedded URLs and the nature of the lures suggest an attempt to trick users into visiting potentially harmful sites, likely for credential harvesting or further malware delivery.

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.online/app/431946152/robux-websites-that-work-game-hack In PDF document text
    • http://pustaka.pn-calang.go.id/repository/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-spin-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-free-spins--coins-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-15-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/roblox-rewards-site_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-gold-cards-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/daily-free-coin-and-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-daily-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-roblox-clothes-boy_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/what-is-exploiting-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/robux-free-co_GM431946152.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_off00005372.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5372 25368 bytes
SHA-256: b5870cc9e7c09f53d8c583e619b1c71a17ad2b47720ba66350287595556bf8f2
font_01_sfnt_off00008dd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD8 2844 bytes
SHA-256: d4efd49219a7ff6424c923a6ccef5b7e1750ded18bbd79546f2ad196ddc76c43
font_02_sfnt_off00009798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9798 18836 bytes
SHA-256: f41676629f29ed6a42ccacba259d9acdb79474bce0625b7b45fdd4d276e33c05

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