Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ec2b42fed1bf25b…

MALICIOUS

PDF

35.4 KB Created: 2021-07-01 17:32:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d40085d94c3cb3d8bb8c57d78c19a1e5 SHA-1: 6ed652548eb64eed173751cdeeccd8d955dfdabb SHA-256: 7ec2b42fed1bf25b9516c4811423ba9c1bdf86a76568b0c3e457f8b3f0cf74c7
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 0.9980

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.co/app/431946152/robux-for-free-pc-computer-game-hack PDF link annotation
    • https://perpustakaan.smp1madiun.sch.id/repository/roblox-free-event-items_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/free-robux-easy-way-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/earn-free-robux-scam-sites_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/free-gift-card-roblox-giveaway-live-youtube_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/how-to-hack-into-coeptus-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/roblox-amby-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/robux-free-glitch_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/roblox-cheat-engine-bypass-updated-2021-unpatched_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/how-to-speed-hack-in-legendary-football-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/free-shirt-download-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/free-robux-and-tix-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/how-too-hack-a-roblox-account_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/free-robux-ipad-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/roblox-how-to-speed-hack-not-patched_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/roblox-400-robux-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/free-robux-100-life-free-for-roblox-pinteres_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/how-to-cheat-on-roblox-lumber-tycoon-2_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_off00003244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3244 22440 bytes
SHA-256: c5438ae68dd7e917e2b7887883caacee7658bd3a0bc08ce4e80d8b57c4cde573
font_01_sfnt_off0000647b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x647B 19412 bytes
SHA-256: 720a468df639ea9f5aadb8ea80591e8a3e1eb672cc5d8370f2043decc96c68b3

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