Malicious PDF — malware analysis report

Static analysis result for SHA-256 a653590d98a898e1…

MALICIOUS

PDF

45.0 KB Created: 2021-06-03 04:58:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4ceabfa294f51b0cbe4d8d85ac365a97 SHA-1: de919ebab738f482c169ffe826624ffca2bb6709 SHA-256: a653590d98a898e177134b3231d67c0c330904e2fc091e9dd3dc2d85d0c64ea9
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action phrase, directing users to websites that promise game hacks and free in-game currency. The primary lure URL is 'https://netcdn.online/app/406889139/coin-master-free-spins-and-coins-hack-game-hack'. While no scripts were explicitly extracted, the PDF structure and heuristics indicate a malicious intent to redirect users to potentially harmful content.

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-coins-hack-game-hack PDF link annotation
    • https://library.uigm.ac.id/repository/free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/earn-rbx_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/minecraft-noob-vs-pro-vs-hacker_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-hack-coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-links-to-get-free-spins_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-free-spin-link-daily_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/fb-coin-master_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/hack-de-coin-master_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/haktuts-coin-master_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-free-robux-on-computer_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_off000054ba.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54BA 24844 bytes
SHA-256: fdc531bb831955739034c91eba35a7e840efdf16bb8f7ced013b0199b68c20a4
font_01_sfnt_off00008dbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DBE 18228 bytes
SHA-256: 968d77e43c6b0b1c299d9da4b9fdaa5840c103d7fe58a67c77b67690964fdfdc

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