Malicious PDF — malware analysis report

Static analysis result for SHA-256 1250dcce2a81b4e0…

MALICIOUS

PDF

34.8 KB Created: 2021-07-10 01:10:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6b61058ff83e190442b8a29df489dcf9 SHA-1: 12e9f556ec2648a71f69f07084664e442ad16f0c SHA-256: 1250dcce2a81b4e09226f4693b991cedd340298e55d87d79238d1cb30de6c90d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a common lure of 'Free Robux' and game hacks to entice users into clicking malicious links. The primary link, http://netcdn.tw/app/431946152/free-robux-no-offers-game-hack, is identified as a redirector, likely leading to further malicious sites or downloads. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at driving traffic to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/431946152/free-robux-no-offers-game-hack PDF link annotation
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/hacked-pokemon-games-roblox_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/site-robux-no-hack_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/roblox-free-item-codes-2021_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/what-is-the-robux-hex-value-in-cheat-engine_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/roblox-promocodes-hack_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/good-roblox-games-about-cities-for-free_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/how-to-get-free-roblox-codes-2021_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/free-holiday-crown-roblox_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/free-roblox-developer-dowloads_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/free-preston-roblox-merch-catolog_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/best-free-faces-in-roblox_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/free-robux-redeem-codes-generator_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/free-exploits-website-downloads-roblox_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/noclip-hacks-for-roblox-arsenal-of-free_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/giving-people-free-robux-livestream_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/hacks-bandit-simulator-roblox_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/my/tasksIn 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_off00003154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3154 22636 bytes
SHA-256: 01927503f7117f6344f9eeceb6c5263b95685c3a1c86d89bd39a54064c54d239
font_01_sfnt_off0000641a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x641A 18716 bytes
SHA-256: 6cef72b87605a464df8901898d024a902d738decefc8e487a7362df6534fb924

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