Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb20c81255a62394…

MALICIOUS

PDF

47.2 KB Created: 2021-06-03 23:23:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e2b67e5bcda0ba2fb31c93ed7f6922e6 SHA-1: 6af922505dead628aa7f9261c2f45065b5e5474c SHA-256: eb20c81255a62394e6728b1966e2a3168e74a9aef22cd0cb3bb810f40403141f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, with one critical heuristic identifying it as a "GAME_HACK_REDIRECT_LURE" pointing to malicious infrastructure. The document body, though partially garbled, contains text related to 'Coin Master Free Spins' and the malicious URL, reinforcing the lure. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest a phishing or scam attempt, likely intended to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/406889139/coin-master-500-free-spins-game-hack In PDF document text
    • http://library.yamasi.ac.id/repository/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/pokemon-go-free-83_GM1094591345.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-free-robux-on-pc-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-free-raid-link_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-roblox-script-executor_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-sue-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-freebies_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-free-online_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-tix-generator_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-back-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spin-facebook-link_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-followers-on-tiktok_GM835599320.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_off00005375.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5375 25104 bytes
SHA-256: 9a4fef1ad87da9151998f9cfbf687cf9d2185998a82a87e0e1ecc9f5abb4126f
font_01_sfnt_off00008c36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C36 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off000095e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95E9 18192 bytes
SHA-256: 125a73f883adbce2d9ba98dbcdb707663d1ca3c21f762afcc3d4ea8c4cd052f9

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