Malicious PDF — malware analysis report

Static analysis result for SHA-256 43e3582a57488bb9…

MALICIOUS

PDF

42.1 KB Created: 2021-05-16 11:41:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9feb13bfaef5a3f32cf36cd3a63522e7 SHA-1: e51208524cf19448f8d0c93ae2e7a5e7172f2ee2 SHA-256: 43e3582a57488bb9bd22f74d8b9ae132bb7330ee98fd0f764f3a00214a2c32fa
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a game hack lure, specifically for Coin Master. The embedded URL and document body text reinforce this, pointing to a malicious website designed to trick users into clicking for a hack. While no scripts were extracted, the PDF structure and linked URLs suggest a social engineering attack to redirect users to potentially malicious content.

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-hack-android-root-game-hack PDF link annotation
    • https://arcasict.nl/images/coin-master-hack-tool-for-pc_GM406889139.pdfIn PDF document text
    • https://arcasict.nl/images/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://arcasict.nl/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://arcasict.nl/images/no-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://arcasict.nl/images/free-robux-wheel_GM431946152.pdfIn PDF document text
    • https://arcasict.nl/images/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://arcasict.nl/images/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • https://arcasict.nl/images/coin-master-fan-page-giveaway_GM406889139.pdfIn PDF document text
    • https://arcasict.nl/images/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • https://arcasict.nl/images/get-me-free-robux_GM431946152.pdfIn PDF document text
    • https://arcasict.nl/images/androeed-ru-minecraft_GM479516143.pdfIn PDF document text
    • https://arcasict.nl/images/free-spin-coin_GM406889139.pdfIn PDF document text
    • https://arcasict.nl/images/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://arcasict.nl/images/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://arcasict.nl/images/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • https://arcasict.nl/images/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://arcasict.nl/images/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://arcasict.nl/images/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://arcasict.nl/images/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://arcasict.nl/images/free-coin-master-spin-app_GM406889139.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_off00004c09.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C09 24340 bytes
SHA-256: 1a540bfbfdf10e1262f26a467c148c9c27e1f43858ea14675fa65689637d6cfb
font_01_sfnt_off00008346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8346 17888 bytes
SHA-256: a5e96d9585e0501da31a45c44832a76ab2659d3be1a27e30c9fef18018f5b43c

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