Malicious PDF — malware analysis report

Static analysis result for SHA-256 e831fb28c7cb83f7…

MALICIOUS

PDF

35.1 KB Created: 2021-06-28 01:03:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 973390ac995683cb8c5e091e7c99ae35 SHA-1: 8fb062cefd32d55b1406788b7332d90775528e22 SHA-256: e831fb28c7cb83f7d5aa521d59e5d8d0fef6727f88591c8ba35be1948ed548d4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks and free currency, directing users to the URL http://netcdn.co/app/431946152/roblox-hacks-unlimited-robux-game-hack. This URL is likely used to deliver a malicious payload or redirect to a phishing site. The ML classifier strongly flagged this PDF as malicious, supporting the observed lure.

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.co/app/431946152/roblox-hacks-unlimited-robux-game-hack PDF link annotation
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/robux-prices_GM431946152.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/coin-master-free-spins-save_GM406889139.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/roblox-free-followers_GM431946152.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/facebook-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/robux-come_GM431946152.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/como-hackear-coin-master-2021-espaol_GM406889139.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/how-to-change-your-name-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/hacking-laurenzside-roblox-account_GM431946152.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master-2021-ios_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_off0000324f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x324F 21976 bytes
SHA-256: 7ed78b77af7528b65f6d646d505f1184415e30b983feeb9d0e8d04310db3b599
font_01_sfnt_off000062c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C9 19452 bytes
SHA-256: 4ae2e5bb5bbe6e2f56ab9aca977550a94c19823954e2f951a97bfe0bfa6ac171

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