Malicious PDF — malware analysis report

Static analysis result for SHA-256 4683423ebb35aa0a…

MALICIOUS

PDF

34.9 KB Created: 2021-07-02 02:38:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 715eb54ebfaa614f5017f1a872c8a581 SHA-1: 30d975d86d1af993aeffcf2e2f0b26c75f47deb8 SHA-256: 4683423ebb35aa0aadf2dc88366b732953723d9ff543b979145a0fe35c3ea57f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for free game currency and hacks, directly linking to a known malicious redirector. The document body and heuristics indicate a phishing attempt designed to trick users into visiting a malicious URL. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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-robux-pin-codes-paste-bin-game-hack In PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-badges-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-robux-inspect-element-no-wait-2021_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-free-spins-and-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-hack-mod-apk-android-1_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-attack-hack-apk_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-costumes-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/is-atticus129-roblox-profile-hacked_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-ninja-legends-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/cheat-codes-for-roblox-skywar-words_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/my-roblox-game-was-hacked_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/dominus-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-robux-2021-on-phone_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/robux-inspect-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/code-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-2021-december_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-hack-xyz-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
font_00_sfnt_off000030a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30A9 22500 bytes
SHA-256: f31c9e2a4013ffbcf3454a634ea3ff142f71a83c4c887bae10b8df47f91560f9
font_01_sfnt_off000062dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62DC 19268 bytes
SHA-256: d2d873fc0c214e4dd66c633d8838993499b19c825e2761c9b39df0f110e1188c

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