Malicious PDF — malware analysis report

Static analysis result for SHA-256 b62fc4e22b48a10c…

MALICIOUS

PDF

34.2 KB Created: 2021-07-06 01:38:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 341e39b8ccf095906eccc081377bd480 SHA-1: eca7064d020d4e3ce87260afd498ef745767b23a SHA-256: b62fc4e22b48a10c270274577962b6242a3eece71d51e255cca36678c56f867b
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-money-hack-game-hack PDF link annotation
    • http://perpustakaan.uf.ac.id/opac/repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/roblox-full-version-free-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/vip-roblox-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/infinite-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/how-to-get-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/earn-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/free-robux-hacks-no-verification_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
font_00_sfnt_off00002fb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB6 22996 bytes
SHA-256: e7e434766ec9f4ac4c65e40239f01bd970a5cef39336b78e4f98ebae2532b44a
font_01_sfnt_off0000633b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x633B 18184 bytes
SHA-256: ab0034aa113820577207db4aaf62a3b22ade484da8517869573635588458df2c

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