Malicious PDF — malware analysis report

Static analysis result for SHA-256 caf312b6410d2457…

MALICIOUS

PDF

34.7 KB Created: 2021-06-18 11:18:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3c54602d2641884e61c8918d8c9808d6 SHA-1: 292b0ead6f539f9ae2bec806e42ece0935390a46 SHA-256: caf312b6410d24571997e6dc620fc9a88880520ee149e9fc9074c1c01156b975
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of free game hacks and currency. The primary link, http://netcdn.co/app/431946152/how-do-yoy-get-robux-for-free-game-hack, is identified as a malicious redirector. The document body and embedded URLs reinforce the theme of exploiting popular games for in-game currency or cheats. No scripts were extracted, but the embedded URLs and redirector heuristics strongly indicate a phishing or malware distribution attempt.

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.co/app/431946152/how-do-yoy-get-robux-for-free-game-hack In PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-unlimited-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-spins-coin-master-november-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-spins-generator-no-human-verification_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-promo-codes-2021-no-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/hack-roblox-players_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-link-app_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-hackprogamers-com_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-anarchy-server-no-hacks_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/without-pokemon-go-free-promo-codes_GM1094591345.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-minecraft-pe-for-free-ios_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-unlimited-spin-hack_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/hack-coin-master-apk-download_GM406889139.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
stream_002_off00002f54.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F54 22324 bytes
SHA-256: cf5361667a5050474bd5c4d35ecae4daa565fc8744669dee45c06ace28adfa7e
font_01_sfnt_off00006128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6128 19492 bytes
SHA-256: f14fb1ca7384adb9b64134dc3734ccee023029261f8a78c7f98790e60326bfdd

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