Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cdf49bb05be0649…

MALICIOUS

PDF

35.1 KB Created: 2021-07-06 12:51:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2c6ed9f39ae76d273bad255876c8db2a SHA-1: 7b6f78b10218c635b551f10febf7b46d762dde37 SHA-256: 9cdf49bb05be0649e3ce22750b425882ad167a7611cc0390107312dd2c2ef3dc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirector infrastructure, specifically advertising 'game hacks' and 'free spins' for popular games. The primary lure URL is http://netcdn.tw/app/406889139/coin-master-facebook-game-hack. The document body, though partially corrupted, contains similar URLs and text related to game exploits, reinforcing the lure. The ML classifier strongly flagged this PDF as malicious.

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-facebook-game-hack In PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/roblox-jailbreak-hack-exploit-walkspeed-noclip-gravity_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/free-roblox-intros_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/coin-master-free-spins-instagram_GM406889139.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/imperium-roblox-hack_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/roblox-sharkbite-sharkteeth-hack_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/free-robux-site-no-survey_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/roblox-polo-ralph-lauren-free-shirt_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/hack-coin-master-online_GM406889139.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/free-robux-game-code_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/hack-coin-master-343-apk_GM406889139.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/free-running-roblox-games_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/how-to-get-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/free-roblox-account-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/roblox-bux-free_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/hackaron-roblox-hack-free-robux-tickets_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/roblox-verification_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
stream_002_off000031f5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31F5 23272 bytes
SHA-256: 723718f3377e6ac766f993486a207fed4351705d7621e663e027990caa030385
font_01_sfnt_off00006692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6692 18324 bytes
SHA-256: a6ed948cf24eb29c37458194fefc1f47b33ce3c9afefa5bc0bcdf74f8f7d5de4

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