Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8eb63aac3a17254…

MALICIOUS

PDF

33.7 KB Created: 2021-07-05 10:48:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9cbdbad0b1a06c1213350f6c32ba226f SHA-1: d1fd34c6783a86915197f6499f88ce58373ef338 SHA-256: e8eb63aac3a1725477fe24831c7a61193339bac44454547daff301c6a791fb9c
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 0.9980

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 http://netcdn.tw/app/406889139/coin-master-website-game-hack PDF link annotation
    • https://mbbs.hr/files/apk-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/free-college-textbooks-tiktok_GM835599320.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/roblox-hack-download-pc-free_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/strawberry-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-robux-rbx_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-fighting-roblox-game_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-robux-for-samsung-s3_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/robux-hack-giveaway_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-things-on-roblox_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/free-coins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/free-spin-coin-master-today_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/rhs-money-hacks-roblox_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
stream_002_off00002d6d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D6D 22944 bytes
SHA-256: 4ad00592822e7de8c877e55a85eb5b3e0eefdd2f9e2b7610ba96df7b0c9f21bc
font_01_sfnt_off00006102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6102 18192 bytes
SHA-256: d2203baa3f8808f575a7890d35593fb80413eb88c3c74b83b513cb0a3929aadd