Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf45f67a2b843465…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 21:29:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 445f6c9026ad7d71b7c898e60623cbde SHA-1: eb83acfadac8772dfaa96b2515f0345ea54d09a9 SHA-256: cf45f67a2b8434655b6b551eab3c6d48714aff4dc04cd0eed239704eacd44432
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and free spins, directing users to a suspicious URL. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs reinforces the phishing or scam nature of the document. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.tw/app/406889139/coin-master-free-spins-whatsapp-link-game-hack PDF link annotation
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/minecraft-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/apoculopse-rising-roblox-hack-script_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi//repository/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/roblox-hack-ghost-simulator-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi//repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/minecraft-pocket-edition-free-apk_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi//repository/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/free-money-codes-for-vechile-simulator-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/roblox-how-to-get-free-membership_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/cheat-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi//repository/best-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi//repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/im-using-a-hacked-clinet-music-id-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi//repository/coin-master-hack-ios-no-verification_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/roblox-free-tickets-cheat_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi//repository/are-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/free-ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/discord-free-old-roblox-accounts_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_off00003183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3183 22664 bytes
SHA-256: c67c50b4642945b43e78056df6653d7d82ace731a95a26a350742823b75c8ad9
font_01_sfnt_off00006419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6419 18708 bytes
SHA-256: 4f4aa986552b769e06e910332aa3ec1082a39755390fbaf1c9f6bef82e01b3fc

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