Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5e4bab1d29376f9…

MALICIOUS

PDF

33.9 KB Created: 2021-07-22 07:12:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 16c61933c65a328c9a68f8ccae5931c3 SHA-1: 14a6a2f3dccfa1b38aca661ad635b382e89e3b85 SHA-256: d5e4bab1d29376f91f39fc32c7e928c408a802c56fb46442e050af767a9a170b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for free game items and downloads, directing users to click on links such as 'http://netcdn.tw/app/479516143/minecraft-java-edition-download-free-game-hack'. This behavior is consistent with phishing or scam campaigns designed to redirect users to potentially malicious websites. No scripts were extracted, but the embedded URLs and the nature of the lures strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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/minecraft-java-edition-download-free-game-hack PDF link annotation
    • http://pustaka-smpn3tpi.com/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-tiktok-accounts_GM835599320.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/robux-free-com_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-spins-coin-master-2021_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
font_00_sfnt_off00002ec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC0 22904 bytes
SHA-256: 1906624b585bbbd3601c6ae9e90e103b84b05271a4dfcc0aa3445b4e68d47400
font_01_sfnt_off000061a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A2 18572 bytes
SHA-256: b44bcce2d8515c0d099a66814c088ed689798a3dbc3c1364cf14b7c888151b67

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