Malicious PDF — malware analysis report

Static analysis result for SHA-256 76b718502ec2b882…

MALICIOUS

PDF

44.7 KB Created: 2021-06-04 02:05:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: afa242d1f1b4d5b61418ed8ad92a6d63 SHA-1: 049c935bcb8c43769c2df032472f17e0d6fdf998 SHA-256: 76b718502ec2b88279e231efa236a8fd2adede78f8cc381b255977751c54496e
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 0.9865

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 https://netcdn.online/app/431946152/roblox-avatar-com-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info//repository/official-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-100-free-spins-link_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-ban_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-daily-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/pubg-uc-india_GM1330123889.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-hack-review_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-hack-version-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/wurst-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/rbx-hut_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-lovenet_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hack-online-cheat_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/minecraft-windows-10-code-free_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
stream_004_off00004db4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DB4 27500 bytes
SHA-256: 55fefd8ba92c9b04f23af44b56fa84a0cae9b56bbc54aa63eadd0d69a2c85135
font_01_sfnt_off00008b61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B61 18492 bytes
SHA-256: 0bfbb41744fd3891f32c18381ea8358331ecc6352836a5a8663314898f67b625

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