Malicious PDF — malware analysis report

Static analysis result for SHA-256 74b8db37b9eac61d…

MALICIOUS

PDF

43.5 KB Created: 2021-06-03 19:57:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: e76b1ad63a1e0a8ef7ffe71f315cdcde SHA-1: ce3211a188ac4be876e221dce7cfaf60021deab2 SHA-256: 74b8db37b9eac61d8a0aca68a0d33af5bcf6f0c16ca9e4fb26e4d3fedc1d77ee
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/406889139/coin-master-free-spins-and-cards-game-hack PDF link annotation
    • http://muslib.unmus.ac.id/repository/android-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-packs-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/what-do-points-do-in-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-hack-spin-generator-tool_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-spin-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/new-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/2021-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coinmasterdailyfreespins-com_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-twitter_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-daily-free-spins-blog_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-blogspot-links_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-2021-apk_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-person_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
stream_004_off00004fda.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FDA 24848 bytes
SHA-256: f2f9a111a0f3798b8251d896bd665546ad3c3c8205d4ec5ea61b366741004630
font_01_sfnt_off0000882d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x882D 18060 bytes
SHA-256: 7f8980b6f3213b204c7b050e62c653166806b65682437d624869b2fc7a4cb6a7

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