Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f342822e35b57d4…

MALICIOUS

PDF

42.0 KB Created: 2021-05-10 14:41:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d1456edc4439ebcbe2b3b0607cc99a3b SHA-1: 920071bb038f8cca460fcdbc7f0c978f0ddac810 SHA-256: 6f342822e35b57d429144836b04ee568b006f5f2ced8e5df25aab1c687dd4965
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-confidence heuristic indicating it links to a game hack redirector, specifically targeting users interested in 'Coin Master' and 'Minecraft'. The document body and embedded URLs reinforce this lure. While no scripts were extracted, the PDF structure and embedded URI strongly suggest a social engineering attack to redirect users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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/how-to-hack-coin-master-apple-game-hack PDF link annotation
    • https://3qblocks.com.tw/image/data/files/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/download-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-spin-and-daily-news-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/rbx-sites_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-hack-no-verification-no-signup_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-minecraft-account-and-password-generator_GM479516143.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-earn-free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/robloxfun-com-robux_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_off000048bb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48BB 25976 bytes
SHA-256: 458d8d7ff863f27670a90b411aeb5e832d8ae9179c31ccb14fc046c98cccb900
font_01_sfnt_off0000829a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x829A 18128 bytes
SHA-256: b6a735d9e3f53415aa491e3485cc1cfcf2c3f420c3f64ca45b3fcf2c99820254

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