Malicious PDF — malware analysis report

Static analysis result for SHA-256 55c658e1af0a6a11…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 09:37:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a175d371842503ce54a19593aa2130c2 SHA-1: d362f8bd8c6e6a7c366c2ae946f06c236a9aab5b SHA-256: 55c658e1af0a6a11e1604f38047e2129bd9a9c74b493042066fc02d687541385
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF document contains embedded URLs and a document body that explicitly advertises cheats and hacks for popular games like Coin Master and Roblox. The primary URL, http://netcdn.tw/app/406889139/coin-master-100-spin-slot-game-hack, likely hosts a malicious application. The ML classifier also flagged this PDF with high confidence, supporting the assessment of 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/406889139/coin-master-100-spin-slot-game-hack In PDF document text
    • https://library.stikeswnpalu.ac.id/repository/infant-roblox-free-hack-2021_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-hack-without-downloading-games_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-pokemon-brick-bronze-cheats_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-time-hack-2021_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/microsoft-bing-robux_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-rewards_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-app-free-download_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-speed-run-4-cheat_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-1x1x1x1-hack-music_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-invite-friends-free-spins_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-hack-tool-pc-download_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-400-spin-link-today_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/rainbow-wings-roblox-free_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-hackprogamers-com_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-glasses-code-to-get-for-free_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-game-for-real_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_off00003202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3202 22480 bytes
SHA-256: b6b3cef419f59816a6d9cee8d5c24f741cfe20bcb9c29b2e0321d555b2a47e47
font_01_sfnt_off0000640f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x640F 18364 bytes
SHA-256: 88797bd407c711461b4daf793cee71082bf3bd1979785ca26b5cf25185c1003e

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