Malicious PDF — malware analysis report

Static analysis result for SHA-256 0851c153ba7b7cfa…

MALICIOUS

PDF

42.5 KB Created: 2021-05-16 03:39:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5157e165a2129e3e6ae93e666906dc10 SHA-1: 69b0ebf6f67d0df752767f633f9dc1dc6d886a8d SHA-256: 0851c153ba7b7cfae670bf42a4a5686f92623ec69b3f7fa51f62792adcc11f36
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to websites offering 'free Robux' or game hacks, a common lure for phishing or malware distribution. The ML classifier also flagged this PDF as malicious with high confidence. The document body and embedded URLs strongly suggest a social engineering attempt to redirect users to potentially harmful 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/431946152/free-robux-codes-2021-not-used-game-hack PDF link annotation
    • https://beauty911.tw/upload/files/coin-master-2021-free-spins-link_GM406889139.pdfIn PDF document text
    • https://beauty911.tw/upload/files/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • https://beauty911.tw/upload/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • https://beauty911.tw/upload/files/roblox-top_GM431946152.pdfIn PDF document text
    • https://beauty911.tw/upload/files/actual-free-robux_GM431946152.pdfIn PDF document text
    • https://beauty911.tw/upload/files/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • https://beauty911.tw/upload/files/microsoft-store-robux_GM431946152.pdfIn PDF document text
    • https://beauty911.tw/upload/files/cheats-coin-master-free-spins-and-news_GM406889139.pdfIn PDF document text
    • https://beauty911.tw/upload/files/free-roblox-website_GM431946152.pdfIn PDF document text
    • https://beauty911.tw/upload/files/coin-master-connection-lost-hack_GM406889139.pdfIn PDF document text
    • https://beauty911.tw/upload/files/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • https://beauty911.tw/upload/files/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://beauty911.tw/upload/files/teach-me-to-hack_GM431946152.pdfIn PDF document text
    • https://beauty911.tw/upload/files/coin-master-free-download-app_GM406889139.pdfIn PDF document text
    • https://beauty911.tw/upload/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://beauty911.tw/upload/files/free-robux-wheel_GM431946152.pdfIn PDF document text
    • https://beauty911.tw/upload/files/how-to-get-free-coins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://beauty911.tw/upload/files/minecraft-116-apk-download_GM479516143.pdfIn PDF document text
    • https://beauty911.tw/upload/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://beauty911.tw/upload/files/roblox-system_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004892.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4892 24780 bytes
SHA-256: 88dabab45c5b0ff5d16c19067e57ee63471d54411e65f4c25136bcdcdf395469
font_01_sfnt_off000081ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81AB 18880 bytes
SHA-256: 342a41804753b243bf13fa7c19db71c7debbb8fa80f4750c82899b0ccf7aa343

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