Malicious PDF — malware analysis report

Static analysis result for SHA-256 d142fbd60a0df5ee…

MALICIOUS

PDF

34.2 KB Created: 2021-06-19 02:09:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 719ee3b98a3068384940674ab2fec4c2 SHA-1: b942c39f3f017a7b432fc35397da5b6d67e54d47 SHA-256: d142fbd60a0df5eea35e8b9ccefc13647e3da76cf5da819a99e21d5fbfdb4403
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary redirector identified as http://netcdn.co/app/431946152/free-robux-no-human-verfaction-game-hack. This URL, along with others, is presented as a lure for free game currency or hacks, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to potentially harmful content.

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/free-robux-no-human-verfaction-game-hack PDF link annotation
    • http://www.stttekstil.ac.id/elib/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-100-spin-slot_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/daily-coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-mining-sim-hack-pastebni-december-2021-pastebin_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-codes-not-used-2021-july_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-daily-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/easy-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-run-roblox-hack-script_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/minecraft-free-download-pc_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_off00002df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DF0 22424 bytes
SHA-256: e0e3e0aed2270a816e8159961aad504f20ac45f3202448756b6858981adf13a4
font_01_sfnt_off00005fde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FDE 19336 bytes
SHA-256: ad4cdbc1a2c37387c0a9354d2b19f5410e0d984f7f56dd2af636f9e351e7db22

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