Malicious PDF — malware analysis report

Static analysis result for SHA-256 28049f9dc0ddbb71…

MALICIOUS

PDF

32.3 KB Created: 2021-06-19 00:21:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a1358ea7ad97359e59ab2decf4c4d7dc SHA-1: 3196f1b1977b04e2b718f4b32d5cc85aa58c8027 SHA-256: 28049f9dc0ddbb7184ff51e009aa3acac0b776b7ddb164745926f759fe2c66de
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 0.9824

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/btools-cheat-engine-roblox-game-hack PDF link annotation
    • http://library.ulb.ac.id/repository/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-official-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/robloxhacks_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/instant-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/pubg-uc-usa_GM1330123889.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/can-roblox-hack-your-phone_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/glitch-to-get-free-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/ww-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-do-you-get-free-robux-without-buying-apps_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-roblox-accounts-with-builders-club_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/robuxmatchcon_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-roblox-accounts-2021_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_off00002996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2996 21908 bytes
SHA-256: e857e04c86916f5afd31177657ab7ba22683d94ae0c4c85cc4324f35e04b2db9
font_01_sfnt_off000059c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59C5 18876 bytes
SHA-256: 4a56d01db7182db47d5e707ad83a2299e5c9f3da3144fd3647dfd2f67053cb7a

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