Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b64acc06986d497…

MALICIOUS

PDF

44.2 KB Created: 2021-06-03 08:14:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2d6852a03ae3a7934f22533fe6edb7ae SHA-1: 8e5b5e74e5ef1bb62fd50cdd6115f3b29d651639 SHA-256: 9b64acc06986d497f665279a3426fb71ca264dae9fe461ebdaafae196c4f361c
142 Risk Score

Malware Insights

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

The PDF document contains a lure for game hacks and free virtual currency, presented as a fake CAPTCHA or download button. It links to external URLs that likely host malicious content or further redirects. The document's structure and embedded links suggest an attempt to trick users into downloading or executing a second-stage payload, potentially exploiting client execution vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/free-robux-only-1-step-game-hack PDF link annotation
    • http://perpus.masda.ac.id/repository/wurst-commands_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-32-hack-apk_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/robux-apk_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/spin-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-hack-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-hack-coin-master-apkmody_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/roblox-skin-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-java-edition-key-free_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-data-breach_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-tiradas-gratis-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-its-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/pubg-uc-app_GM1330123889.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_off0000518e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x518E 24160 bytes
SHA-256: ebfdcb2a2543abc6e3395a42f4a3ab1688c6469a2431ed9d6db370fb09085977
font_01_sfnt_off000088c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88C0 18656 bytes
SHA-256: 070bf31dcf9002553526675ed1cd7b39f0747279791c235f0424fbc506b236c5

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