Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9d18b24a3295847…

MALICIOUS

PDF

42.7 KB Created: 2021-05-13 08:30:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 23cb4a8814586298655c635cea0bb472 SHA-1: c2ee01b727cc9771ea7d2e1eb3928d2c8b033541 SHA-256: e9d18b24a329584788c0bc6d6899c683320a8f7bd2ee3cf598689700a66084f2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, with a primary URL pointing to a 'coin master free coins link' lure. This is consistent with a phishing or scam attempt to trick users into visiting potentially malicious websites. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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-coins-link-facebook-game-hack PDF link annotation
    • https://goodtools.tw/upload/files/free-coin-master-gift-link_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/minecraft-free-android_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-do-you-get-roblox-money_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-lovenet_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-link_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-coin-spin_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/robux-without-verification_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-game_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_off00004c88.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C88 25188 bytes
SHA-256: a8cb24c9665b51fb98c433b4cb5bd7752449995f4346d35d6d628bfa324fd938
font_01_sfnt_off00008571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8571 18040 bytes
SHA-256: 63f6a73c8fcac7a0296ba30c45c7d116406f1db46acc5b5307ffbf1c764f0ccd

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