Malicious PDF — malware analysis report

Static analysis result for SHA-256 1044e9d50b54b54e…

MALICIOUS

PDF

51.3 KB Created: 2021-06-11 06:43:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 79b7d0fd885abcb5488859f97855f091 SHA-1: 4270e0f595223a73bf997ef8b6c4f1625a37cd68 SHA-256: 1044e9d50b54b54ee12994166eeac86c6416925c3afde7f4ae905d80302eb1ad
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9685

Heuristics 4

  • 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.
  • 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.tw/app/431946152/can-you-hack-roblox-accounts-game-hack PDF link annotation
    • https://loba.com.vn/public/upload/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coinmaster-com_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/robux-online_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/krnl-download_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/dev-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/get-free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/tiktok-free-folowers-joker_GM835599320.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-promo-codes-list-2021_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-promo-code-2021_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-get-free-shields-on-coin-master_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-tiradas-gratis-2021_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-get-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-gen_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-apk-mod-free-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5004 25416 bytes
SHA-256: 2c7bc99b8dbc367e3abaee15af6d97ff09a68238a54a6b1612218f82269a3fa9
font_01_sfnt_off00008a35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A35 2912 bytes
SHA-256: 02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
font_02_sfnt_off0000942d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x942D 6768 bytes
SHA-256: fa93de321190668b294ff46149e4b98ac349b4fd022dcee9ecd964f7f59f3f9a
font_03_sfnt_off0000a46c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA46C 18588 bytes
SHA-256: 2786b1b857c572913cace85d332dbc96413a5988f9859ae69da55c86f93871d4