Malicious PDF — malware analysis report

Static analysis result for SHA-256 525d208321169a7f…

MALICIOUS

PDF

48.4 KB Created: 2021-06-03 06:20:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: b3752bacf830b9c5740d9e24b434d7da SHA-1: f98dcc97dc7208a65da55457c1e8215958e33ce8 SHA-256: 525d208321169a7f9330c65fde317447c6ff006738ec220e13eb44047499f474
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 0.9796

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.online/app/431946152/free-robux-generator-no-human-verification-2021-game-hack PDF link annotation
    • https://www.summerland.com.tw/upload/files/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-robux-please_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/minecraft-bedrock-free-download-pc_GM479516143.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-34-4-hack_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-free-online-game_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/robuxmatchcon_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/when-tiktok-free-download_GM835599320.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-apk-mod-coin-master_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-hack-apk-ios_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-moderators_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/play-roblox-free-online_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
stream_004_off0000542c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x542C 24924 bytes
SHA-256: b461f60f2c692d7a23183053bb9f53f3dc1a2b835c08576cc03aced9ab77b1a1
font_01_sfnt_off00008ddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DDD 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off0000978d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x978D 19260 bytes
SHA-256: cfeb00e99c7da41c79bd6814c2de1bf58f441159bdfe452787b9448ffd27beb4