Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e0327b8033c9446…

MALICIOUS

PDF

48.2 KB Created: 2021-05-16 20:51:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 4de68d4016697bd91cc2b0548c7f09e6 SHA-1: b226d00188a062e2b98845514230a9f02f46a514 SHA-256: 8e0327b8033c9446456aeb71a3f21fb33ee69212009694707e74ecc3d3fbff2b
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a fake CAPTCHA lure and a prominent link to a 'game hack' redirector, indicating a social engineering attempt to trick users into visiting a malicious site. The embedded URL, https://netcdn.xyz/app/479516143/is-minecraft-free-on-nintendo-switch-game-hack, is the primary indicator of this malicious intent. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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 https://netcdn.xyz/app/479516143/is-minecraft-free-on-nintendo-switch-game-hack PDF link annotation
    • https://ptun-denpasar.go.id/new/public/ckfinder/userfiles/files/free-robux-site_GM431946152.pdfIn PDF document text
    • https://ptun-denpasar.go.id/new/public/ckfinder/userfiles/files/free-coin-master-spin-generator_GM406889139.pdfIn PDF document text
    • https://ptun-denpasar.go.id/new/public/ckfinder/userfiles/files/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • https://ptun-denpasar.go.id/new/public/ckfinder/userfiles/files/free-roblox-printables_GM431946152.pdfIn PDF document text
    • https://ptun-denpasar.go.id/new/public/ckfinder/userfiles/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://ptun-denpasar.go.id/new/public/ckfinder/userfiles/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://ptun-denpasar.go.id/new/public/ckfinder/userfiles/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://ptun-denpasar.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-download-ios_GM406889139.pdfIn PDF document text
    • https://ptun-denpasar.go.id/new/public/ckfinder/userfiles/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://ptun-denpasar.go.id/new/public/ckfinder/userfiles/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://ptun-denpasar.go.id/new/public/ckfinder/userfiles/files/real-roblox_GM431946152.pdfIn PDF document text
    • https://ptun-denpasar.go.id/new/public/ckfinder/userfiles/files/wizard-hacks_GM479516143.pdfIn PDF document text
    • https://ptun-denpasar.go.id/new/public/ckfinder/userfiles/files/no-human-verification_GM431946152.pdfIn PDF document text
    • https://ptun-denpasar.go.id/new/public/ckfinder/userfiles/files/coin-master-online-hack-no-survey-no-password_GM406889139.pdfIn PDF document text
    • https://ptun-denpasar.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-2021-app_GM406889139.pdfIn PDF document text
    • https://ptun-denpasar.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://ptun-denpasar.go.id/new/public/ckfinder/userfiles/files/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • https://ptun-denpasar.go.id/new/public/ckfinder/userfiles/files/earn-robux-online_GM431946152.pdfIn PDF document text
    • https://ptun-denpasar.go.id/new/public/ckfinder/userfiles/files/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • https://ptun-denpasar.go.id/new/public/ckfinder/userfiles/files/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • https://sigmaclient.info#2In PDF document text
    • https://flux.today#3In 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_003_off00004fc1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FC1 30632 bytes
SHA-256: 2feea3d5003d37eafa2c013a7d5a0c81894961ea46344efcad2d950eee2ec0ca
font_01_sfnt_off0000902e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x902E 2952 bytes
SHA-256: 2021865124e0da768db44cda0fd0531e434e2af44b7cc5fe11859efe54487e98
font_02_sfnt_off00009a56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A56 18212 bytes
SHA-256: 88833f0f37aaf816a00c97530fc90e87f2df28a22611e5c00792867ae98cdb6c

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