Malicious PDF — malware analysis report

Static analysis result for SHA-256 44af696488716f65…

MALICIOUS

PDF

35.1 KB Created: 2021-06-27 10:33:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c1c0dcb057c0065b6f96b659b92bb8dd SHA-1: 370b16775f5f4bd27936afb3f835058ba00efa60 SHA-256: 44af696488716f65ef66d4e28b02aa2c8f86e4a3ac07ceb05d8691f852f42c98
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

This PDF document contains multiple links that impersonate brands and lure users with promises of game hacks or free accounts. The primary link, http://netcdn.co/app/431946152/dantdm-free-roblox-accounts-game-hack, is a strong indicator of a credential phishing or redirection attack. The ML classifier also flagged this PDF as malicious with high confidence.

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/dantdm-free-roblox-accounts-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/dantdm-free-roblox-accounts-game-hack PDF link annotation
    • http://library.ulb.ac.id/repository/roblox-weight-lifting-simulator-3-strength-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-catalog-hack-script_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/just-go-to-mobihack-robloxhack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/hack-someones-account-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-do-you-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/help-my-roblox-account-got-hacked-and-dosent-have-security_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/hacker-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-hack-people-on-roblox-easy-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-hack-version_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-admin-hack-script-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/robux-inspect-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-hack-ohne-handynummer-und-geld_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/como-tener-robux-gratis-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-free-buff-body_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-paid-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-spin-link_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/hack-roblox-jailbreak-2021-new_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-free-exploit-that-can-run-obfuscated-script_GM431946152.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_off0000306f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x306F 22544 bytes
SHA-256: 921b1216e374b5a47b771b6e9642d9e514c20c39f0bb0f46ae28f0d3eedf7661
font_01_sfnt_off000062e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E0 19496 bytes
SHA-256: d50a42a1018f5d6adc0bacca0fd2dee47b0bf5117ad7ee34028fb063e7d74c3a

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