Malicious PDF — malware analysis report

Static analysis result for SHA-256 c594fe6daf14bf8a…

MALICIOUS

PDF

34.3 KB Created: 2021-06-25 13:48:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 69afad0fb294e5a7dfafc100ec638864 SHA-1: 1af0de8f834298b868dd165718c6a17ff512e253 SHA-256: c594fe6daf14bf8aa4418a3bbbe9f1a72cd13540259fe5570bb38a368a8cb4b4
122 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 brand-impersonation credential phishing. 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: http://netcdn.co/app/431946152/roblox-hack-extension-game-hack.
  • 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.co/app/431946152/roblox-hack-extension-game-hack PDF link annotation
    • http://suaedy-library.net/repository/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-minecraft-skin-creator_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-spin-and-win-coin-master_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/ways-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-mod-version-free-download_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-spins-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/roblox-dungeon-quest-no-skill-coulddown-script-hack_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/10-dollar-roblox-card-free_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/robux-free-co_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-level-4_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-hack-apk-33-download_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/robux-legit-hack_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/pastebin-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/toolbox-for-minecraft-pe-mod-apk_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/cheat-roblox-robux-2021_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-daily-free-coins-link_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/tiktok-free-hosting_GM835599320.pdfIn PDF document text
    • http://suaedy-library.net/repository/youtube-como-ser-hacker-en-roblox_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-hack-app-for-iphone_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_off000030d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30D8 21900 bytes
SHA-256: 376d521298143c990d89c2b5efc6cbaa2cc60ea28631a88c07b00aa978ca8320
font_01_sfnt_off00006172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6172 18880 bytes
SHA-256: afe7f0896a15e4b9f133617e207acd4a5c1337fd8fc107ce5e1e606658d63adb

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