Malicious PDF — malware analysis report

Static analysis result for SHA-256 38efb2a61f6dd43c…

MALICIOUS

PDF

36.2 KB Created: 2021-07-05 00:16:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2dab2c07515d7ca4d7a25c920b84aedc SHA-1: 6d04bc620db178b3177d33a02210ac7cdf537d3a SHA-256: 38efb2a61f6dd43c47a76a675770bf4f03a89d18894d4697207571837ecb085f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising "game hacks" and "free generators." The primary lure URL is http://netcdn.tw/app/479516143/how-to-get-minecraft-for-free-on-xbox-one-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or scam attempt, likely intended to lead users to download further malware or engage in fraudulent activities. The ML classifier also flagged this as malicious with high confidence.

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/479516143/how-to-get-minecraft-for-free-on-xbox-one-game-hack In PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/free-daily-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/oprewards-login_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/http-coin-master-hack-club_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-free-spin-today-2021_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/demon-roblox_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/robux-win_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/get-me-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3553 23440 bytes
SHA-256: 9ac61a2b20b8a0f74ca7c5e9f4649ee084d07abf3f73ab3cb40dee4177b5bac9
font_01_sfnt_off000069b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69B4 18756 bytes
SHA-256: d5ec30f65413d7db6993b9641d1e97629dc650179ebea3b1673208637b129ed3

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