Malicious PDF — malware analysis report

Static analysis result for SHA-256 816bfde2ca735873…

MALICIOUS

PDF

45.8 KB Created: 2021-06-10 22:42:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fd1020e8c03cf7b16ffb427aa5dedce2 SHA-1: d757a2c157615dd311e4701ba25ae9ecf1ff2b2e SHA-256: 816bfde2ca73587309278d7c771c7356611689a8bd19e4fd300125284ec0c3a9
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 0.9864

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.tw/app/431946152/how-to-hack-for-robux-on-pc-2021-game-hack PDF link annotation
    • https://luckydealuae.com/uploaded_files/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/free-robux-offers_GM431946152.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/minecraft-free-education_GM479516143.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/how-to-get-free-unlimited-robux-indigojoe_GM431946152.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/coin-master-exchange-40-free-spins_GM406889139.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/free-likes-for-tiktok_GM835599320.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/how-to-get-java-minecraft-free_GM479516143.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/games-for-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000529c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x529C 26004 bytes
SHA-256: bc6a71bb5c1e16262df0c45e9f6d7661ca5bab65b32986745e074736e42f153c
font_01_sfnt_off00008dd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD9 19132 bytes
SHA-256: 83f5b3aa7d8837d85ec28868a2661287792854e3dd4de70cceec71e312e26a0e

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