Malicious PDF — malware analysis report

Static analysis result for SHA-256 00192a4f5acf3432…

MALICIOUS

PDF

33.3 KB Created: 2021-07-22 13:05:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e6390a744a9854fd9759ffd43d3471dc SHA-1: 7fb098fa7465efe287f5a637dda62f56304c3554 SHA-256: 00192a4f5acf3432e79bf17ae57baab587c131667bda5cfb2cb007de490185d5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirector infrastructure, specifically advertising "free Roblox accounts with Robux" and "game hacks". The primary malicious URL identified is http://netcdn.tw/app/431946152/free-roblox-accounts-with-robux-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristics indicate it's designed to exploit user interest in free in-game currency or cheats to redirect them to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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/free-roblox-accounts-with-robux-game-hack In PDF document text
    • https://www.milewood.co.uk/images/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • https://www.milewood.co.uk/images/is-minecraft-free_GM479516143.pdfIn PDF document text
    • https://www.milewood.co.uk/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.milewood.co.uk/images/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • https://www.milewood.co.uk/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • https://www.milewood.co.uk/images/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • https://www.milewood.co.uk/images/free-robux-offers_GM431946152.pdfIn PDF document text
    • https://www.milewood.co.uk/images/free-tiktok-likes_GM835599320.pdfIn PDF document text
    • https://www.milewood.co.uk/images/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • https://www.milewood.co.uk/images/earn-free-robux-for-roblox_GM431946152.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_off00002b32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B32 22860 bytes
SHA-256: 4f066d758aee6073dcc33147bdbac0dbfa20beff66aa928bfa15b6aefec53a70
font_01_sfnt_off00005ea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA2 18860 bytes
SHA-256: 865574bf4c8bdee12f9e426a22e4a3f20a88a2333a4bf7711c0a9b9eff7733be