Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ccee276baf8fd6d…

MALICIOUS

PDF

48.3 KB Created: 2021-06-03 05:28:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4f283c0a3f1d5e81f2d9f121f5cc97c4 SHA-1: 44754d0328d5d1927a8d35be89089b2bf1b483c7 SHA-256: 4ccee276baf8fd6dc3c12f6092fa294d136ba6cc26607883c70a6b279ccf0560
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering game hacks and free currency, indicating a lure for scams or malware downloads. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the embedded URLs suggest a phishing or social engineering attack vector, likely aiming to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.online/app/406889139/coin-master-daily-free-spins-link-2021-game-hack PDF link annotation
    • https://3qblocks.com.tw/image/data/files/free-robux-earn_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/roblox-free-body_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/robux-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/mcpe-master-coins-hack_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/minecraft-free-download-mobile_GM479516143.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/easy-robux_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-hack-app-for-iphone_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/are-there-any-coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coinmaster-hack_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-daily-bonus_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f8b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F8B 28148 bytes
SHA-256: 94b7eecacab0254ba37601528dcc3f48c94012de6157175d154240cbc12f3eba
font_01_sfnt_off00008e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E83 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00009834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9834 18880 bytes
SHA-256: 4ccb81aabfc378a65bbb004da1df6276046c1b1923188410bd025f5007717b79

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