Malicious PDF — malware analysis report

Static analysis result for SHA-256 2efd0dbd4ac1682f…

MALICIOUS

PDF

48.5 KB Created: 2021-06-03 12:12:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9a3aa607ed43f87bdb7a313e18b0e8ee SHA-1: e1bcc0e2409b3b30aca618f0cbea6798947e2964 SHA-256: 2efd0dbd4ac1682f992d193e595da1ebcf858aca0eae3ea36685ca9d1efbabe9
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 0.9796

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: https://netcdn.online/app/479516143/is-minecraft-education-edition-free-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 https://netcdn.online/app/479516143/is-minecraft-education-edition-free-game-hack PDF link annotation
    • http://katalog.gemalibrary.net/repository/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/hacker-de-robux-para-roblox-real_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/minecraft-mod-menu-apk_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-free-items-2021_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-spin-best-link_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/i-cant-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/are-there-any-coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-daily-free-spins-25_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-official-website_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/robux-come_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/give-me-robux-now_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/cheat-codes-for-roblox-2021-rocity_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-games-with-free-boombox_GM431946152.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
font_00_sfnt_off000052c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52C0 30536 bytes
SHA-256: 08af51628a8b741f18ac79cb3a88f10143956343373e52ab6acd7c2fb73d0a04
font_01_sfnt_off00009073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9073 3252 bytes
SHA-256: 0f12079575334f136c8a6ad83d601032f419f5984287c7a6d703251d6c768e9c
font_02_sfnt_off00009bb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BB8 18024 bytes
SHA-256: 860599eb2378c11ce9f069b8b1214934614c40beead093e3b25ec1c42f286d72

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