Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cc181fda94edaca…

MALICIOUS

PDF

42.7 KB Created: 2021-05-13 01:43:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 015af55d518aa5c564b9a33df8cacf45 SHA-1: 7b20a86ae2492c5886287d802600b4c8b4513131 SHA-256: 4cc181fda94edaca99163fb7d76ad477618595f339a0cfb4ea12f031811feca1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering 'game hacks' and 'free robux', which are common lures for phishing and malware distribution. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' specifically flags a link to 'https://netcdn.xyz/app/431946152/robux-today-game-hack', indicating a redirection to malicious infrastructure. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/robux-today-game-hack In PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-coins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-coin-spin-daily-link-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-heaven-daily-free-spins-and-coins-links_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-account-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/how-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-link_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-reward-link-2021_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/mcpe-master-coins-hack-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a6d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A6D 24900 bytes
SHA-256: 9cf53185cc0202870284264f33f372d64784859a7200b60fe798a42c5e942b7f
font_01_sfnt_off0000840c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x840C 18432 bytes
SHA-256: 959daec5ee9bc3c71d76c0b44e5e7b2fade628e041cf04f050b5917282f814df

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