Malicious PDF — malware analysis report

Static analysis result for SHA-256 30a421de475b44ca…

MALICIOUS

PDF

34.8 KB Created: 2021-07-03 22:54:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a63347c736a828bfa9e3a1f3eb359917 SHA-1: 9b7f94335534516062ddd808cd9e9a4d938d9d24 SHA-256: 30a421de475b44ca5cb955495fbdcb1d3d1ec85593ac630e86413d1989a6192f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of free game items. The primary malicious URL identified is http://netcdn.tw/app/406889139/free-spins-coin-master-no-human-verification-game-hack. The document body and heuristics indicate a social engineering tactic to drive traffic to potentially malicious sites.

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/free-spins-coin-master-no-human-verification-game-hack In PDF document text
    • http://perpustakaan.idia.ac.id/repository/picture-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/robux-survey_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/earnrobux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/xray-hack_GM479516143.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/roblox-free-toy-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/roblox-gift-card-free-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/www-free-robux-win_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/roblox-hack-meep-city-phone_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-robux-roblox-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/roblox-free-items-glitch_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-robux-hack-greasyfork_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_off00002e78.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E78 23988 bytes
SHA-256: 675aaca869837afb825ca0ddc5855ead67db61f30608cabc9da5f7b638019f58
font_01_sfnt_off0000644e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x644E 18708 bytes
SHA-256: d2a1b07289c19f1fde4fd3f456fc03ccb8fb99bcee34f754f2ace9f359cfe8c2