Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b6fcf185d40d647…

MALICIOUS

PDF

56.0 KB Created: 2021-06-04 05:27:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 2a075bab0347f7dc1e137410767fb12c SHA-1: 436f92b33cb0a577dd8afc2cf9dbff87f3dd4dad SHA-256: 4b6fcf185d40d647dd31d8c10b1c148730720c080a5f244d1231ce7183e64c39
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 0.9650

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/406889139/get-coin-master-free-spin-game-hack PDF link annotation
    • http://lib.unar.ac.id/repository/free-spin-coin-master-app-download_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/pokemon-go-free-box-march-2021_GM1094591345.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/how-to-hack-coin-master-cheat-engine_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/village-4-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/what-is-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/coin-master-hack-tool-v1-9-apk_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/coin-master-daily-bonus-hack_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/best-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f1d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F1D 26724 bytes
SHA-256: 7b848f2d79c66c503d5eb003e46ef58587c5f6b2fc95e7ae5a5d15df7909025d
font_01_sfnt_off00008cb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB3 3088 bytes
SHA-256: 21947db80f63681192ff4d23c9293372afcdd8455d0079c5ca62ec2c2320d79e
font_02_sfnt_off0000977e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x977E 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2
font_03_sfnt_off0000aaa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAA3 17884 bytes
SHA-256: e2d35692e43efa734225fccc8f864e809a8787bafbe3710f48ba51a9ce51e9b4
font_04_sfnt_off0000cb66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB66 4272 bytes
SHA-256: fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0

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