Malicious PDF — malware analysis report

Static analysis result for SHA-256 a225fea50c8be001…

MALICIOUS

PDF

33.7 KB Created: 2021-07-19 12:27:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f05346f53f6b5a72c47fc49ae8e01fbe SHA-1: 70cb2ada6cd68ee2468a93ff073b2819e8ee2d17 SHA-256: a225fea50c8be0019170830db40a6af77a5e66b589138c8d631fbf3207ef584f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to pages offering "game hacks" or "free spins", a common lure for malicious content. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of these lures and the high ML score indicate a high likelihood of malicious intent, likely to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9627

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 http://netcdn.tw/app/406889139/coin-master-free-spins-and-coins-2021-game-hack PDF link annotation
    • http://elearning.mtsn2lamtim.sch.id/__statics/gudangsoal/files/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn2lamtim.sch.id/__statics/gudangsoal/files/free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://elearning.mtsn2lamtim.sch.id/__statics/gudangsoal/files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2lamtim.sch.id/__statics/gudangsoal/files/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn2lamtim.sch.id/__statics/gudangsoal/files/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2lamtim.sch.id/__statics/gudangsoal/files/free-printable-minecraft-coloring-pages_GM479516143.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
font_00_sfnt_off00002cec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CEC 23320 bytes
SHA-256: f4064ce0b50e06bc043c75af2eab1906bca8d1da818e442babd0230ca5147183
font_01_sfnt_off00006198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6198 18460 bytes
SHA-256: c259e1f543e24e5bfe6ce8cf601a342cc00786119f62dbfadbed712250492c46

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