Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7122c30bbd47572…

MALICIOUS

PDF

47.4 KB Created: 2021-06-04 04:41:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 281a3be5735390d7d2e981fdd9b98ead SHA-1: ed3d3f90679900fbb8aa92fef2d29caefe5787b2 SHA-256: a7122c30bbd47572dc4e80f9f8f9307afd47d3bccde4b0d240f694cf9f4cab8a
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded links that redirect to malicious infrastructure, specifically advertising free game currency or hacks. The primary malicious link identified is https://netcdn.online/app/431946152/roblox-com-games-referrer-roblox-player-game-hack. The document's structure and embedded URLs strongly suggest a phishing or scam attempt designed to lure users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.online/app/431946152/roblox-com-games-referrer-roblox-player-game-hack In PDF document text
    • http://perpus.stfm.ac.id/repository/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-20210-robux-download_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/microsoft-store-robux_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-spin-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/legit-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/get-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-hack-spin-ios_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-do-i-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-free-spin-link-today-50_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/como-generar-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/link-for-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50A0 25564 bytes
SHA-256: 6d817f71b6c15eaefb957fe03ed9d427ef11dc0d468484d2bcddf89a5e131a88
font_01_sfnt_off00008baa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BAA 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off00009595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9595 18608 bytes
SHA-256: fe127bfd5ab6a4b2b53b099a15c551b8e40bc135ed62b4e782cd2911e4f76f6e

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