Malicious PDF — malware analysis report

Static analysis result for SHA-256 4db6a6f9ac8e7426…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 04:03:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 34ee3684c569735f2a9ed29f7e437397 SHA-1: 1df6f35d61e5fb005ae16bf2fc42abe3c6ef2f72 SHA-256: 4db6a6f9ac8e7426757afa78f2add5f07bd363583d0abe7ae2f9310e783b91ff
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/how-to-get-free-spins-on-coin-master-facebook-game-hack PDF link annotation
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/how-to-hack-unercorn6-in-roblox_GM431946152.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/coin-master-freebies_GM406889139.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/install-coin-master_GM406889139.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/roblox-admin-system-hack_GM431946152.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/free-coin-master-glitches_GM406889139.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/free-minecraft-website_GM479516143.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/best-way-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/pubg-uc-mod-2021_GM1330123889.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/roblox-rewards-site_GM431946152.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/cheat-engine-roblox-scripts_GM431946152.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/daily-coin-master-free-spin-link-facebook_GM406889139.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/coin-master-hacker-club_GM406889139.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/roblox-com-free-robux-games_GM431946152.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/coin-mast-hacks_GM406889139.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/coin-master-daily-free-cards_GM406889139.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/robloxhacks_GM431946152.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/free-minecraft-skins-xbox-one_GM479516143.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_off000030d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30D0 23120 bytes
SHA-256: a68e3c2612dba3e023acb955324d50afaa25c0bae624593ab1bea4591bae5aad
font_01_sfnt_off000064f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F3 18664 bytes
SHA-256: e014b96f3b4d84aa2f2a11dde0e83fd0357a22873c3da6238c6514ecd5ae27f1

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