Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ef59820dfc61d75…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 13:00:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a657e7910d185fe7e2b669590a5b468a SHA-1: 5c98f937a5a2dcabb6752b3c98ca1caa1ce17cef SHA-256: 0ef59820dfc61d7568f2e1db101896f5ff48edfe200332b13505462b8abfd17e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The primary lure URL is http://netcdn.tw/app/431946152/can-i-play-roblox-for-free-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering tactic to drive users to potentially malicious content or downloads.

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/can-i-play-roblox-for-free-game-hack In PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/roblox-cheat-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/mcpe-com_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/roblox-re_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/roblox-free-robux-codes-without-bc_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/gaming-dunia-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-free-spins-usa-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/photon-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-animation-roblox-studio_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/roblox-free-download_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-coin-master-spins-blog_GM406889139.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_off0000317c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x317C 22104 bytes
SHA-256: 2e225a3b30bd823e549a9bab97210233ff7a87828cfdb67877feeef9d1f63573
font_01_sfnt_off000062ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62AB 18796 bytes
SHA-256: aaf50ab04f977bd4215316972b9526370c64b164592acc0a25601024eb7fdd22

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