Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aa2ef80a6286585…

MALICIOUS

PDF

36.7 KB Created: 2021-07-03 15:34:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 52078f80603f0d7434f04c7ba9efbeca SHA-1: 4c0e52d75c04a73e1276c64026ed0c8a4665bce2 SHA-256: 5aa2ef80a6286585d2efb85e5bae6052bba802232e0986872c26ca2d665cc038
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/431946152/free-robux-that-actually-works-2021-game-hack PDF link annotation
    • http://www.elibrary.perludem.org/repository/coin-master-free-spin-today-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/cheats-for-getting-money-in-roblox-meep-city_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-trader_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-a-free-roblox-account-with-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/bloxy-awards-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-pet-food-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/hacker-outfit-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-free-robux-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-jordan-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-card-generator-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/cheat-roblox-retail-tycoon-116_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hack-someones-account-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/expliot-box-for-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-club-tesla-free_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_off000033b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33B4 23076 bytes
SHA-256: 3139d6e90446d5c89f377897eae122468d4bfad8a6ce205679dbb88297a3470e
font_01_sfnt_off000067ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67AD 20008 bytes
SHA-256: 8708610d65edee27054ce301a9bd75c7c559fd6231599c341fc0984ebcbede77

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