Malicious PDF — malware analysis report

Static analysis result for SHA-256 20ec40e5940ab198…

MALICIOUS

PDF

34.4 KB Created: 2021-06-20 06:33:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ca6392087adce337b1958274de387f77 SHA-1: a71d08321fba3028d781028163e830b488f4eebb SHA-256: 20ec40e5940ab1982042e692a2c7c934df7a11a9c897ce5535154b7edd4fec72
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting 'free generator / game hack' lures. The ML classifier strongly flagged this PDF as malicious. The primary lure appears to be related to obtaining free Robux for Roblox or spins for Coin Master, indicating a scam or phishing 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/robux-for-free-meme-game-hack In PDF document text
    • http://perpustakaan.ipts.ac.id/repository/robux-gives-roblox-haks-free-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/blogspot-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/online-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-daily-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/gear-me-hack-script-roblox-pastebin_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/robux-today_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/hackear-juego-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-robuxdill_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/hack-my-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-coloring-pages-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/roblox-system32-host-file-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/fly-script-roblox-hack_GM431946152.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_off00002e8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E8C 22512 bytes
SHA-256: e71c706a286359e9a27a6ac1697c702245723f5656e77a36119073e24be917cc
font_01_sfnt_off000060ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60FF 19172 bytes
SHA-256: 71dd07f85bfd1d435371ae54225568ec90aac6bdb3092e964b7fe547939bcd14

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