Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf5262303d54862a…

MALICIOUS

PDF

32.1 KB Created: 2021-07-20 04:42:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d934a353d3d4f81b027efd69c228557a SHA-1: ae347b6801d549ab695b4f9b59c9c5e250c67cea SHA-256: cf5262303d54862a17a4479dd296e2e5cfedada84278735b1d817abe813b121a
82 Risk Score

Malware Insights

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

The PDF document uses a lure related to 'free Minecraft Maps' and 'game hack' to entice users to click on a malicious URL. The document body contains obfuscated text and multiple URLs, including the primary malicious redirector http://netcdn.tw/app/479516143/free-minecraft-maps-game-hack. This suggests the document is designed to deliver a second-stage payload or lead the user to a phishing site, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/479516143/free-minecraft-maps-game-hack PDF link annotation
    • http://vedrachemicals.ro/images/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • http://vedrachemicals.ro/images/robux-free-com_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • http://vedrachemicals.ro/images/how-to-get-free-tiktok-fans-without-human-verification_GM835599320.pdfIn PDF document text
    • http://vedrachemicals.ro/images/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
    • http://vedrachemicals.ro/images/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/minecraft-noob-vs-pro-vs-hacker-vs-god_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_off00002c91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C91 21972 bytes
SHA-256: 73ae21e38c81758b1ff0972548523f9b6ef7652a7298372492e0d8cb76b98eb7
font_01_sfnt_off00005cf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF8 17744 bytes
SHA-256: 642e76b92f67015eb87e7bb2f8978493590a3d76ebc6958dd5b149369a6bd5f2

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