Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef1d9aba1fa92dcf…

MALICIOUS

PDF

44.6 KB Created: 2021-05-11 05:05:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 30778993dfaf333877aa4ba9a42bb1cd SHA-1: 2d3f22f5b46f8782f231ff12b1d6796ee0ccb983 SHA-256: ef1d9aba1fa92dcf4e691bc475739cb9ecdf0e033d5d1d3a095ee965950d76b4
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 0.9632

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.xyz/app/406889139/coin-master-gold-cards-free-game-hack PDF link annotation
    • http://butkimloai.com/images/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://butkimloai.com/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://butkimloai.com/images/toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://butkimloai.com/images/new-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://butkimloai.com/images/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://butkimloai.com/images/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://butkimloai.com/images/coin-master-free-spins-reddit_GM406889139.pdfIn PDF document text
    • http://butkimloai.com/images/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://butkimloai.com/images/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://butkimloai.com/images/rbxdemon_GM431946152.pdfIn PDF document text
    • http://butkimloai.com/images/make-free-robux_GM431946152.pdfIn PDF document text
    • http://butkimloai.com/images/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://butkimloai.com/images/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://butkimloai.com/images/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://butkimloai.com/images/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://butkimloai.com/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://butkimloai.com/images/free-robux-script_GM431946152.pdfIn PDF document text
    • http://butkimloai.com/images/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://butkimloai.com/images/free-robux-today_GM431946152.pdfIn PDF document text
    • http://butkimloai.com/images/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4864 25804 bytes
SHA-256: 883e944ab3d273f2b32a131feb5a030c3a9929a9b1b805fe052a661b278d29de
font_01_sfnt_off000082bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82BC 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008ca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA7 17960 bytes
SHA-256: 5f0d383e38c54a4b706fba9e56337a6488be6196f7a5d6bfa1241f48271576e4

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