Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3cb4f2a6396a0c5…

MALICIOUS

PDF

42.7 KB Created: 2021-05-11 19:42:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ccddcd67ae3b71e85d73239b6b0f9854 SHA-1: 4eb2da23ffe54ff94ae547614ef38041c4987239 SHA-256: d3cb4f2a6396a0c5f76800ef98f1c65bdec89034dc406ba2e783d28fe50e6ba6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that are designed to lure users into clicking on links promising game hacks and free currency. The primary URL, https://netcdn.xyz/app/406889139/coin-master-free-spins-no-survey-game-hack, is directly linked to a game hack lure. The presence of these links, combined with the ML classifier flagging the PDF as malicious, strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-free-spins-no-survey-game-hack PDF link annotation
    • http://library.umuslim.ac.id/repository/coin-master-spin-blogspot_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/hack-de-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/get-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-free-spin-bonus_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-roebucks-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/get-coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/hack-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-800-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/change-roblox-username-free_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/easypoints-gg-roblox_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_003_off00004b92.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B92 25160 bytes
SHA-256: 3e2f1e30614f5ea5747d0603ad540602573354131bc560b5e115421156e9707d
font_01_sfnt_off0000848b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x848B 18320 bytes
SHA-256: 8f8c071623a7703d27897fee0415069e7501bbca86f42ef797abe0a074016bd4

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