Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c8ac61ec49d1f48…

MALICIOUS

PDF

34.1 KB Created: 2021-07-09 03:24:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 29eef4a4a435400568637a94c441f4e9 SHA-1: 3d3def10ec649efeeae0bd9f06172548c41fa050 SHA-256: 6c8ac61ec49d1f48f4111bb9e7ea034d8db9801f9eff975c000810f2c17314ed
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-risk heuristic indicating it links to a 'free generator / game hack' redirector. The document body and extracted URLs reinforce this, promoting 'free Robux' and game cheats. The primary IOC is the malicious URL used in the lure.

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/earn-free-robux-game-hack PDF link annotation
    • https://pustaka.mic.sch.id/repository/robux-cheat-cods_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/hack-card-collection-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/retail-tycoon-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/ip-grabber-hack-for-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/free-robux-place-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/hack-roblox-account-online_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-hack-mobile_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/free-robux-no-human-verification-and-no-download_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/can-you-cheat-to-get-money-on-bloxburg-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/roblox-cheat-engine-commands_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/working-cheat-engine-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/nuevos-hacks-de-roblox-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/minecraft-pe-hack-client-2021_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/one-for-all-roblox-free-shop-t-schirts_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/best-free-mask-on-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_off00002ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EE4 22756 bytes
SHA-256: 40c334955e9b4db56ed59580cc9eaf214bc2d85f4383256e3999b1703be5c993
font_01_sfnt_off00006127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6127 18716 bytes
SHA-256: 8f38c6e249cfb46641478d2db6e31ecd999c597cf7db8b591ffee8c5f62f2864

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