Malicious PDF — malware analysis report

Static analysis result for SHA-256 833d4805ca910f13…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 14:11:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: de3f463699218ab3ebd8ab3e464a35b5 SHA-1: fe87d25800789d0cbc8ef83e1b86fffa5f531884 SHA-256: 833d4805ca910f13c90a34c56e9bfefc26066a4e9d8ebdc38e8a80a475b3edbf
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.tw/app/406889139/coin-master-tiradas-gratis-link-game-hack PDF link annotation
    • https://c2o-library.net/catalog/repository/free-generator_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/v3rmillion-roblox-admin-hack_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/robux-premium_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-robux-no-verifaction-or-servey_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/collect-free-spin-linms-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-easy-verification_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/mcpe-optifine_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-cheat-mods_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-hacked_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/hacks-para-roblox-descargar-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/a-hack-to-get-the-bage-admin-on-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/creepy-hacker-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-change-name-in-roblox-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/robloxhacks_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-zombie-attack-cheats_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_off00003050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3050 23236 bytes
SHA-256: b448824238bba46eac714108b090c3b5714e17e7032247ab3d0e2ed32e96ea00
font_01_sfnt_off00006482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6482 18180 bytes
SHA-256: eb709c113ba60c115f2b8b8b229b5927732780444a7a314d98a2d1fc1dd07480

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