Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcd0ce2f697a6f5e…

MALICIOUS

PDF

48.9 KB Created: 2021-06-04 01:45:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 36dbe018b809e007cd9e21eebfb50144 SHA-1: d9bb7fe8406919000b6134fc2bfabaf58c170d1f SHA-256: dcd0ce2f697a6f5e27e6e63b34b8228930cfb0d4ccd1412a8deaa96fd057e0c8
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses a callback-phone (TOAD) lure and 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 0.9796

Heuristics 6

  • 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
  • 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 https://netcdn.online/app/431946152/how-to-get-100-robux-for-free-game-hack PDF link annotation
    • http://perpus.unpam.ac.id/repository/free-roblox-executor-no-key_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-hack-mcpe-master-coins_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/no-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/mangocheats-com-hack-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-coins-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-minecraft-realms-to-join_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-card-hack_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-do-you-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-tricks-and-hacks_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-gain-more-spins-on-coin-master-for-free_GM406889139.pdfIn 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_004_off000052fb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52FB 25216 bytes
SHA-256: 3343dd7267f660f4e0f6b7469148bd102f255280c6b584e5b5ddb7fde932e354
font_01_sfnt_off00008cda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CDA 6100 bytes
SHA-256: f866077ce59d6ea276f75e4af76daa2aab5f3a1a679df144776123d85664d65c
font_02_sfnt_off00009b66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B66 18560 bytes
SHA-256: ebe7febd7c9c87dba90e20cfb7f210acfd9bc8f8383e28ef55b41a5f3c0fccc9

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