Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a7f9432c0c8755e…

MALICIOUS

PDF

36.1 KB Created: 2021-07-04 14:30:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 35ea2724ad57c8e3f8c1479b1943afc0 SHA-1: b035b5e866485b656db59c53f0909a4b229f4d51 SHA-256: 9a7f9432c0c8755e6ab86fb7a1aba4abb685a9dea62b7f554aadeecd63beb0a3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising free game hacks and currency. The primary lure is a link to 'how-do-you-get-free-robux-without-doing-anything-game-hack', which is hosted on netcdn.tw. This suggests a phishing or scam campaign designed to trick users into visiting potentially harmful websites. No scripts were extracted, but the embedded URLs and the nature of the lure strongly indicate a malicious intent.

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/how-do-you-get-free-robux-without-doing-anything-game-hack In PDF document text
    • http://lib.akper17.ac.id/repository/coin-master-game-hacks_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-minecraft-svg-cutting-files_GM479516143.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/roblox-com-redeem_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coin-master-35-2-hack_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coin-master-free-spins-whatsapp-link_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-roblox-followers_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/hack-master-coin_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-to-make-a-private-server-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/bloxland-earn-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_off00003102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3102 23300 bytes
SHA-256: 3326c4262e9144d5cc409cdf52c7a8908d6ca59874dd1eb6180c908d6e914b2d
font_01_sfnt_off00006549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6549 19980 bytes
SHA-256: a10b86a95e1163526836e1939e7e424d9e0b635c08126f71a6a7b060d93e13a9

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