Malicious PDF — malware analysis report

Static analysis result for SHA-256 723bd3ea67d21d5e…

MALICIOUS

PDF

33.9 KB Created: 2021-07-19 20:23:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e203c5862c1cb5e5b0977331161d6d48 SHA-1: a03b6745fa7dc9297cce76804cbccc1503ca900f SHA-256: 723bd3ea67d21d5e521071533af12eb7380bdd7e5c1463d2bf606e94e7cfbff2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically advertising 'free generators' and 'game hacks' to lure users. The primary redirector URL is http://netcdn.tw/app/431946152/how-to-get-free-robux-for-kids-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a malicious workflow designed to lead users to potentially harmful content or further downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/431946152/how-to-get-free-robux-for-kids-game-hack In PDF document text
    • https://successfulauto.ru/images/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • https://successfulauto.ru/images/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • https://successfulauto.ru/images/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://successfulauto.ru/images/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://successfulauto.ru/images/minecraft-free-version_GM479516143.pdfIn PDF document text
    • https://successfulauto.ru/images/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://successfulauto.ru/images/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://successfulauto.ru/images/get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • https://successfulauto.ru/images/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • https://successfulauto.ru/images/how-to-host-a-minecraft-server-for-free_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_off00002bad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BAD 23504 bytes
SHA-256: be5348784e62ae0953fdc0d863ce7ca32b8b6f3e71dd023eb61f5ee5afc581d6
font_01_sfnt_off000060dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DC 18764 bytes
SHA-256: d079bf469505872766dd14d06cf0fce057ad6bb15d7e0a6d6ef53e681c132249