Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3e9b310a30fcfa5…

MALICIOUS

PDF

39.0 KB Created: 2021-06-20 08:07:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e498bedd1967bbb918f64864ae08189c SHA-1: ab69b729d2aca4f64d659f03f69eb05569ddb18f SHA-256: c3e9b310a30fcfa511cbd6f9c410e199e6a04a26304e69d7e5de9918021e2429
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 0.9985

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.co/app/431946152/how-to-hack-roblox-with-v3rmillion-game-hack PDF link annotation
    • http://winnerwater.com.tw/image/data/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/how-to-reach-hacks-in-sf-roblox_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/get-free-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/are-pubg-uc-cheap_GM1330123889.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/framed-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/free-robux-net_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/farmtown-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/mcpe-client_GM479516143.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/60-free-spins-coin-master_GM406889139.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_off00003e0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3E0D 22800 bytes
SHA-256: 22c576eb68cab9c1a8a9b01d49d83256797a6eec8071657ec8384680569ee864
font_01_sfnt_off000070e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70E5 19976 bytes
SHA-256: 934c5a6b243a4540b684e2fd95b251a82f9f0522d4b36e88f8048a473fd25d9b

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