Malicious PDF — malware analysis report

Static analysis result for SHA-256 e181dfec0c2f57e8…

MALICIOUS

PDF

47.1 KB Created: 2021-06-03 11:35:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6b89ace5af2392ae24fbf48e85af771d SHA-1: 523d447082bbacf6d9e46ba3ce2aa7d26e2e3a34 SHA-256: e181dfec0c2f57e85787c7d3f08c75be04cfedd376bab10ef7a57e2938605e8e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link disguised as a "game hack" generator, which is a common lure for phishing or malware distribution. The ML classifier strongly indicated maliciousness, and the embedded URL points to a suspicious domain. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it is designed to redirect users to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/how-to-generate-free-coin-master-spin-game-hack PDF link annotation
    • http://www.perpustakaan.smansa-bdl.sch.id//repository/free-links-for-free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id/repository/coin-master-tiradas-gratis-2021_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id/repository/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id/repository/coin-master-free-spin-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id//repository/how-to-hack-coin-master-using-es-filer_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id/repository/try-minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id//repository/today-coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id/repository/hack-avatar_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id//repository/get-free-spins-on-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id//repository/coin-master-free-spin-link-today-50_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id/repository/no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id//repository/pubg-uc-carding-in-pakistan_GM1330123889.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id//repository/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id//repository/coin-master-free-spin-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id//repository/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id/repository/pokemon-go-free-app_GM1094591345.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id/repository/free-roblox-hair-codes_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id//repository/free-minecraft-account-and-password_GM479516143.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
stream_004_off000052d4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52D4 23840 bytes
SHA-256: 897f9a01f73df177a9759cd5249716280e7892176c9171a820ceca1118913808
font_01_sfnt_off00008952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8952 3560 bytes
SHA-256: 9d03f7c6c62ba3e7fdc0441e9d982a863b2b60b781165d6920512f68ecc4a440
font_02_sfnt_off000095d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95D9 18052 bytes
SHA-256: bc7397b7892e84f8f438cdf02f94402a75785e8c4a68cee0805b100b0e31cd84

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