Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd0164bfbd6f41ef…

MALICIOUS

PDF

33.4 KB Created: 2021-07-04 11:44:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b2b0ca98b85d416b783484b1a9ed7986 SHA-1: d0a8a724bab69c9be18dda8f7df7ac0912174ecc SHA-256: bd0164bfbd6f41ef01485c45e0146835e691bef63cb4192fc1518466f0d32e5b
102 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 callback-phone (TOAD) 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.tw/app/835599320/tiktok-free-folowers-jio-phone-install-tamil-game-hack PDF link annotation
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/free-robux-hacker-come_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/is-roblox-studio-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/robux-app_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/www-robux-redeem_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/roblox-hack-legend-speed_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/roblox-password-hacker-generator_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/free-pe_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/are-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/hack-download_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/free-spin-in-coin-master_GM406889139.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_off0000303e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x303E 21092 bytes
SHA-256: 8edb70ed387df2680f854d68e1962c7dd7c42e69575a3bb1ecb733e7afa33bdf
font_01_sfnt_off00005e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E07 18956 bytes
SHA-256: 1aeea0e450d21055c162ba3037d53debb32ab658baf588e9a6a245edd39b0e40

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