Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fb64a57e0fa6515…

MALICIOUS

PDF

53.1 KB Created: 2021-06-03 10:42:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9e91bd4df784ad4d87ad0283f73cfc4b SHA-1: 97b1c92ea10224fd75092cd0b5a7ab27f25f3fb5 SHA-256: 0fb64a57e0fa6515f8c7ccfda48ad14867e2c4426234208dc7ce7d1a2c17ca3f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9607

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 https://netcdn.online/app/406889139/coin-master-unlimited-spin-and-coin-hack-game-hack PDF link annotation
    • http://pustaka.keperawatan.unand.ac.id/repository/free-robux-reddit_GM431946152.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/free-spins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/free-roblox-boy-hair_GM431946152.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/cone-master_GM406889139.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/coin-master-50-spin-link_GM406889139.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/what-is-wurst_GM479516143.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/coin-master-hack-apk-latest-version-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/www-rbx-com_GM431946152.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/how-to-change-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/flip-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/get-more-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000053bc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53BC 25376 bytes
SHA-256: b471e4a8fa244d1361aadab89caf9aa82ad565bce59714757378a1a125addaa8
font_01_sfnt_off00008d9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D9A 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off00009780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9780 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_03_sfnt_off0000ac0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC0B 18584 bytes
SHA-256: c8e711e41b973747ec323a47a761701fdaf1f8f6730ed7788ccf1517fe3358ad

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