Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0a5fd14b25306c9…

MALICIOUS

PDF

36.3 KB Created: 2021-05-23 02:06:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0e0ab080c2b7399d172274d3a7abe234 SHA-1: 5120a01fd1c92040164dc72b5883c07db3462d9a SHA-256: c0a5fd14b25306c9d7f1fcf18c166587a8d4fc9ed958850fab0dabe7a8885159
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to sites offering 'free generators' or 'game hacks', a common lure for malicious content. The ML classifier also flagged the PDF as malicious. The document body explicitly mentions 'Free Tiktok Accounts With Followers' and includes a 'CLICK HERE TO ACCESS TIKTOK GENERATOR' call to action, reinforcing the social engineering aspect.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/835599320/free-tiktok-accounts-with-followers-game-hack PDF link annotation
    • https://luyenthitoanpro.com/public/upload/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/hack-the-coin-master_GM406889139.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/real-robux-generator_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/apk-coin-master-hack_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_002_off000031f5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31F5 26328 bytes
SHA-256: ce4adfbfbee8775c1f4c8a804a4c1b79e664d4fae9695ff2e25b8701f801af49
font_01_sfnt_off00006cef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CEF 18200 bytes
SHA-256: 00ff3188f7c2cc6f3bb1e48311a72fd536e799d3f1f3caf1b59355958851fd7e

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