Malicious PDF — malware analysis report

Static analysis result for SHA-256 cba279c5e85e650f…

MALICIOUS

PDF

34.7 KB Created: 2021-06-18 02:14:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2584d55a33b4e1584e5b971e921a3d7c SHA-1: d415d3bd0fe829fa44a263a3f3cd5bca54403e91 SHA-256: cba279c5e85e650f6d714828d48161158ed272bf503d1648bde7d0a31340ba0e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of free game items, such as Robux or Coin Master spins. The ML classifier strongly flagged this PDF as malicious, and the embedded URLs are indicative of a phishing or scam campaign designed to lead users to potentially harmful content or further exploitation.

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-to-get-free-admin-commands-on-roblox-2021-game-hack In PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-scamer_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/can-you-still-make-free-roblox-shirts_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-promo-code-2021_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-spin-coin-master-link-today_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/get-free-spins-link-in-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-hack-client-mac_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-hack-spin_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-70-spin-link-2021_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
font_00_sfnt_off00002eff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EFF 22168 bytes
SHA-256: 89103fd25db8169f221227f4c7b8002e296697de07512da1ba87a65b57a8c8f1
font_01_sfnt_off0000602b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x602B 19876 bytes
SHA-256: 63526db13dae773792d8396fad7d197c440714dcfb7918959e5ffe74ccce295e

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