Malicious PDF — malware analysis report

Static analysis result for SHA-256 23ebf15b2572806b…

MALICIOUS

PDF

46.3 KB Created: 2021-06-03 12:58:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 33b6ca4708bcb0d6f7687dd094aca7bc SHA-1: a23595dbe8bb08111a0a851110ece7ef7b9e3c0c SHA-256: 23ebf15b2572806bbcaa16d4fe956074a194b5fac7a98aab43d2f257922b1b8f
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 0.9832

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/479516143/how-to-create-a-minecraft-server-for-free-game-hack PDF link annotation
    • http://e-library.smkn1jombang.sch.id/repository/minecraft-com-free_GM479516143.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/fbchampion_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/body-roblox_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-online-hack-generator_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/how-do-i-earn-robux_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-spins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/minecraft-ps3-free-download_GM479516143.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/can-i-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/minecraft-114-download_GM479516143.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/rbx-robux_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-hack-version-download-2021-android_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/minecraft-hacker-skin_GM479516143.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
stream_004_off000053f9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53F9 30452 bytes
SHA-256: 92bc4c7baf20a096efc27d58a944709e6d8a0a5f812ac2fa2fd82219e6f4bbba
font_01_sfnt_off0000937e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x937E 17988 bytes
SHA-256: 060fb71443e6007603a371ac142d4c0d51e0ba8cefae348522c79638c30c3a2b

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