Malicious PDF — malware analysis report

Static analysis result for SHA-256 5420ba47592ce8ae…

MALICIOUS

PDF

35.3 KB Created: 2021-06-28 09:49:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: edb7dcd414a6c903557ca857e245ef4d SHA-1: 2d89270afe8cfa22a0130acddf70c9eb0ea23f60 SHA-256: 5420ba47592ce8ae251caaa16f059400ea1534fe9e7cc78accbc3d0c6ba3735c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically advertising free game currency or hacks. The heuristic firings indicate these links are associated with known malicious redirectors and lures for game-related scams. The document body, though partially corrupted, contains similar lures and URLs, reinforcing the phishing and redirection 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/free-builders-club-roblox-no-human-verification-2021-game-hack In PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-hack-roblox-to-get-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-hacks-iphone_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-robort-free-mega-vip_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-roblox-hacks-jailbreak_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-free-spins-cheat-codes_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/minecraft-pe_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/microsoft-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/redeem-roblox-card-free_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-games_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-robux-fast-free_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-turn-into-super-saiyan-roblox-no-hacks_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-play-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/tiktok-free-package_GM835599320.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_off00003128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3128 22104 bytes
SHA-256: 14ff4b716772bb6360a0582ad04fa02c7fa972766eaff37cccc6fe8ff87c0318
font_01_sfnt_off00006240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6240 19984 bytes
SHA-256: c6ee60e3bcb46178a6fe2a8ea4736343daa272528afff196f55489da9436e525

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