Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a352ead27c77b06…

MALICIOUS

PDF

35.5 KB Created: 2021-06-30 10:05:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f18ea312c9b7b1e2810ef582f606f383 SHA-1: dd9fd78d1fc399fbc82ee7421869ebe1b478c66e SHA-256: 1a352ead27c77b069be3a7a502fa1af0b67b055e94c1953c92fc9868df943ac0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.co/app/431946152/roblox-scp-site-61-admin-cheat-game-hack PDF link annotation
    • http://pustaka.ust.ac.id/repository/cardcode-pw-free-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-codes-no-survey-no-download-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-tix-in-roblox-pokemon-brick-bronze_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/game-action-aventure-magic-in-roblox-free_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-mmc-zombies-project-cheats_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/hack-money-for-roblox-lumber-tycon_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/counter-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-do-you-earn-robux-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/jailbreak-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/inspect-element-hack-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-for-roblox-yolasite-com_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-robux-no-inspect-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-super-easy-and-very-quick-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-h-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-fly-hack-in-roblox-phantom-forces-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/cool-robux-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-roebucks-in-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_off00003102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3102 22644 bytes
SHA-256: ba1731676b7dfd7471092bd80174de0f13930a3241aac2a8675aa9b518a52ce9
font_01_sfnt_off000063da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63DA 19760 bytes
SHA-256: 89a40f5080facc1e3dc0b1a75f3840c1e6c237825574e9072ee98e86b432a629

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